Mail Protocols

Topics including TCP/IP, OSI, Netbios, exploiting share, proxies and much more

Mail Protocols

Postby weazy » Fri May 30, 2003 6:56 pm

Contents

* Introduction
* List of Protocols and RFCs
* Other Sources of Information
* Capabilities of Well-known mail clients
* List of Implementations
* Some web-based clients
* Some other packages for desktop systems
* Key and Other Issues
_________________________________________________________________

Introduction

There are advantages to having a central server receive the mail
destined to desktop computers and having the desktop computer collect
the mail from the server on demand:

* Your desktop computer may be down quite a bit and less network
bandwidth and less of the processing resources of the sending
computer are used if the computer receiving your mail is ready to
receive.
* Some people use more than one desktop computer to read mail.
* A desktop computer may not have the resources to store all the
mail you receive.
* It can make your e-mail address more like other users'.

The easiest way to "implement" this is to run the central mail server
like any multi-user system: let people sign on to it and use some mail
utility. Then desktop computer users can use "terminal sessions" to
sign on to the central mail server and read their mail (e.g. with Unix
"pine"). This has the disadvantage of making the desktop computer
users learn and use the central mail server's procedures.

SMTP, the "internet" mail protocol used to deliver mail between
multi-user systems only supports mail transfer initiated by the sender
(actually, SMTP has a method to initiate reception, i.e. the "TURN"
command, but the method has problems, didn't catch on and is not
used). Other protocols have been devised to allow a desktop computer
to request transfer of mail, thus able to make use of a central
server. These include the published variants of POP, IMAP, and DMSP.

POP, POP2, POP3

These are rather minimal and are designed to be so. The three are
similar but not enough alike to be interoperable. They are basically
designed to identify the user by username and password, to transfer
the mail from server to desktop computer and to delete the mail
transferred. It is assumed that SMTP will be used to send mail.
Messages can be retrieved individually, but the only information you
can get about a message without transferring it is its length in
bytes-- useful for desktop computers with limited storage.

POP3 has a number of optional extensions including Xtnd Xmit which
allows clients to send mail through the POP3 session rather than using
SMTP. Another extension is APOP which allows RSA MD5 encryption of
passwords passed over the network.

POP3 is now by far the most-used variant of POP, but POP2 may still be
used at a few sites. POP3 has a couple of optional extensions: one to
avoid sending passwords, and one to aid in reading bulletin boards.

IMAP2, IMAP2bis, IMAP3, IMAP4, IMAP4rev1

The IMAP family is similar to the POP family, but also gives clients a
way to do string searches through mail that still resides on the
server. This is designed to allow the desktop computer to be more
selective as to which mail will be transferred. Among other features
IMAP also allows mail on the server to be placed in server-resident
folders. The POP protocols, on the other hand, are designed for
simpler server software.

IMAP2 is used quite a bit. IMAP3 is an incompatible offshoot that has
not been implemented much. IMAP2bis is an extension of IMAP2 which is
still in use. Among other things, it made servers cognizant of the
MIME-structure of a message. IMAP4 is a refinement and extension of
IMAP2bis, and while it may still be in use somewhere, IMAP4rev1, which
makes necessary corrections to a few problems with IMAP4 as
documented, has replaced it (it was given a new designation to allow
you to demand it by name) and it is suggested that IMAP4-non-rev1
support be dropped from servers & clients in favor of IMAP4rev1.
IMAP4(rev1) also extends IMAP to have many other features including
some of those associated with DMSP.

ACAP

ACAP (Application Configuration Access Protocol), formerly IMSP
(Interactive Mail Support Protocol), is a protocol which is being
developed to compliment IMAP4 by offering related e-mail services
beyond the scope of IMAP4. It includes the ability to subscribe find &
subscribe to bulletin boards, mailboxes, and to find and search
address books.

IMAP vs POP

As of this writing (4/97), there are a many more POP than IMAP client
implementations and an Internet Service Provider is much more likely
to provide POP3 service than any kind of IMAP. POP3 is an Internet
Standard whereas IMAP4rev1 as of 2/97 is a Proposed Standard. But
interest in IMAP is growing with big-time software houses announcing
support. IMAP4rev1 has more features, basically designed to support a
model where users store their received mail on a server rather than on
their own computer. The big advantage cited for IMAP is that people
who "do e-mail" from different computers at different times have the
same access to their message store from any of the client-computers
they use. The cost of this model (aside from issues such as the
complexity and the availability of implementations) is in running a
server with sufficient space for the clients' message stores. With
personal computer disks now often above a gigabyte (presumeably
growing to 10s of gigabytes over the next few years) and multimedia
messaging in our future, people storing e-mail on their own hard disk
will have a lot of space and ways to use it. A central store serving
10-20 users will not be overly difficult, but one for 1,000 or 10,000
users will be very large (terabytes?) if it is to offer comparable
space. The question comes down to the tradeoff between the advantage
to users who computer-hop against the costs of managing the large
amount of central store. See also online document imap.vs.pop.html
(reference below) and section below "Issue of Remote Access".

DMSP

Also know as PCMAIL. Desktop computers can use this protocol to both
send and receive mail. The system is designed around the idea that
each user can own more than one workstation; however, the system
doesn't seem to handle the idea of a "public workstation" very well.
The desktop computers are assumed to hold state information about the
mail, a directory so to speak, and when the desktop computer is
connected to the server, this directory is updated to "reality". Note:
DMSP never gained the following of IMAP or POP and I've heard the
software is no longer available.

ESMTP ETRN

ETRN, which is documented in RFC 1985, is a modified version of the
original SMTP TURN command which is allowed as an option in Extended
SMTP (ESMTP). It provides a similar functionality to POP.

Who uses these protocols?

These protocols were designed and implemented mostly by
Internet-connected universities with some participation by other
Internet-connected research institutions. They were certainly devised
to handle the type of electronic mail that universities must do. A
typical site has probably 10 to 10,000 desktop computers and has an
Internet connection and also runs Unix, giving them the Unix sysadmin
expertise that makes running a Unix-based server attractive. Most of
the servers listed here run under Unix though some run under other
large systems and as time goes on, we are seeing more servers that run
on PCs and Macintoshes.

A more recent use of these protocols has been by Internet Service
Providers and their customers. Internet Service Providers require a
way to offer e-mail services to however many customers they provide,
to customers who are connected to the network only part of the time.
Like a campus application, they may have 10 or 10,000 customers to
serve. These protocols offer a distinct advantage over SMTP for such
purposes and form an attractive complementary e-mail service for WWW
users.

Disadvantages

There are a number of disadvantages associated with the use of these
protocols:
* since these have long been no more than a small part of the e-mail
market, software using these methods is often incompatible with
other useful and/or well-known software. A couple of examples are:
+ Use of mail-enabled applications on desktop computers (there
is no fundamental reason that mail software using these
protocols can't provide the API used by mail-enabled
applications, but in general this hasn't come about yet)
+ Use of the usual Unix mail readers & the Unix .forward files.
* since the server is holding mail for the person, the person can
use the server for storage. This leaves the potential for all the
disk-space problems inherent in shared disks: people hogging
disk-space or forgetting to clean up, etc.
* sizing the server: a perennial question people ask is "How big a
machine do I need to serve my campus (or department, or
whatever)". Naturally no one can give a straight answer because it
depends upon so many factors.

Issue of Remote Access

Modern commercial e-mail packages typically have features designed to
assist in remote access of ones e-mail. Features include:

* ability to download mail through a modem
* ability to synchronize two different systems which you are using
to read your e-mail by plugging them together.

Any method of reading e-mail using PCs or Macintoshes can be used
remotely via remote control (the "PCanywhere(tm)" method, e.g. by
dialing up your own office PC/Macintosh and using one of the several
kinds of software that allow you to control your PC/Macintosh over the
phone). Also, any LAN-based method can be used by using one of the
several methods of providing the same protocol support over dialup
lines as are on LANs (SLIP or PPP for the above-mentioned,
TCP/IP-based protocols, ARA for Appletalk-based protocols, etc, and
sometimes using two different protocols, one incapsulated in the
other) under the constraint that any operations that use the network
will be much slower. Also, POP3 is sometime used directly over modems
(for example, Eudora can be used in this manner).

The ideal protocol for remote access would not penalize the user for
the much slower communications speed (usually slower by a factor of
100: note that a lot of LAN-based software was written without regard
to minimizing the necessary communication, thus is really hurt by such
slow speeds), yet would allow the same software to run both remotely
and locally, with a wonderful user interface. It would also not be
overly expensive in communications equipment or services. This is a
difficult set of objectives and the above-three protocols can achieve
some of them for some users, but what they actually achieve depends a
lot on the user's pattern of e-mail usage. If a user reads just a
small amount of mail, then we would not worry about the length of time
necessary to download it remotely with POP3, but if the person
receives a lot of mail, but just wants to read a small amount of it at
home, then with IMAP4, they could pick and choose what to read,
eliminating some download time. If someone is paying for the telephone
line time (possibly the user if it is a long distance call; in any
case, the institution pays a monthly fee for each line it offers,
which is dependent upon how many users it is serving, how often they
call, and how long their calls are) then IMAP4's natural method of
usage which requires the phone call to remain while a user is reading,
poking around, sending, and rearranging mail can be much more costly
than using POP3 if one call is used to quickly download all the mail
and another later call is used to send any replies. Thus with POP3 a
user might have two 1 minute calls before and after a 30 minute e-mail
session instead of keeping the call for 30 minutes with IMAP4, and
each phone line the institution offers could be serving 15 times as
many such users who would each pay a lot less in long-distance phone
bills. Note that with the advent of multimedia mail (see MIME below)
whose messages can be very large, it is possible that downloading even
one message that you end up not reading remotely could ruin such a
nice-sounding scenario.

Note that with the growth of Internet Service Providers, remote access
is becoming the normal way for many people to do their e-mail, and
offering such services is one of the major growth areas for POP and
IMAP.

MIME

MIME (Multipurpose Internet Mail Extensions) is a relatively new
Internet standard for the format for messages with multiple parts, and
with non-ASCII data. Any client that can import or export files can
use MIME in a clumsy way if you have a program to create and/or decode
a MIME message. Some clients have built-in features to do this.
Client-server mail protocols generally only deal with entire messages,
and can retrieve MIME messages as well as any other messages since
MIME was carefully designed to be transparent to existing mail
systems. However, IMAP4 has features to allow retrieval of individual
parts of MIME-encoded messages. The chart below lists whether a
package has MIME support. Servers for protocols that don't offer any
special MIME features are marked na for Not Applicable since they need
do nothing for users to use MIME. All IMAP4 servers can also do this,
but the chart lists whether they include explicit MIME support.

Approaches not covered by this memo

* Proprietary protocols
* file sharing
* APIs
* X.400
* Web

Vendors can invent their own protocols similar to those listed above,
and some have.

LAN e-mail can also be implemented using file sharing, e.g. using NFS
to allow separate Unix workstations to share the same mail spool area
just as if it were mail being stored on one system, or using Novell's
SMF (Simple Message Format) in a Novell file server. If the
applications are written so that they are careful to lock files
correctly, then this works. An advantage is that any network file
protocol can be used and the e-mail application can be somewhat
independent of the file protocol. For example, Unix systems could use
either AFS or NFS. Pegasus is a PC & Mac application that uses Novell
file service to do something similar. Specifications for client-server
interaction consist of the file service protocol along with the server
directory structures & conventions used for storing e-mail.

A very popular approach with commercial vendors is the use of APIs.
The client talks to the server using an API (Applications Programming
Interface), i.e., a set of subroutine/procedure library call
definitions for a library providing subroutines/procedures to send,
receive, and manipulate e-mail. With the use of any remote procedure
call mechanism, the client can be located on a different computer from
the server. This allows some mixing and matching of RPC mechanisms,
underlying protocol stacks and APIs: e.g., a vendor defines an API,
and it can be run over IPX or TCP/IP, in each case over the protocol
stack's RPC mechanism. There are a number of APIs now being pushed by
vendors: MAPI (Microsoft); VIM (Lotus); AOCE (Apple). These API's have
been the basis for numerous mail-enabled applications: e.g. a word
processor that allows you to send or receive documents through e-mail
simply uses one of these APIs allowing it to communicate with any
server supporting the same API. Specifications for client-server
interaction consist of the protocol stack up to the RPC protocol, then
the API itself.

Note that though the API approach in combination with remote procedure
calls allows one to implement client-server e-mail without the use of
the protocols covered by this document (IMAP, POP, etc), that there is
no theoretical reason why such APIs can't be used in an IMAP or POP
environment. The necessary software would be a "driver" or piece of
"middleware" that provides the APIs calls to mail-enabled applications
and uses POP, IMAP, or whatever over a LAN to reach a server. The
advantages/disadvantages of such an approach as compared to the use of
RPCs is open to debate. UniPalm's Mail-IT is an example of client
software that provides MAPI within the client and uses POP3 to access
the server.

X.400 is the message transport defined for use between
telecommunications vendors and customers by the international
consortium of national standards bodies known as ISO. It roughly
corresponds to TCP/IP's SMTP and RFC822 header format. A consortium of
X.400 vendors (XAPIA) have developed an API for X.400 applications
called CMC.

Mail servers are now available that offer e-mail through normal web
interfaces, i.e. HTTP & HTML. In this case, your web browser is your
client. Potentially, a server could be built that allows reading from
any web browser software. Some kind of authentication is necessary.

Another trend is web servers that act as POP-to-web gateways or
IMAP-to-web gateways. The client is still just a browser: perhaps a
JAVA-enhanced interface is offered, perhaps not. If the server has a
mail store, it is acting as a whole mail system and if it can receive
SMTP mail, requires no other server. But suppliers of mail services,
wanting their systems to be universal, can have them pick up mail from
a POP server or an IMAP server, perhaps at the client's discretion. In
the case of IMAP, the server can be written so as to leave stored mail
on the IMAP server, or it can support both "remote" and "local"
folders, in this case, "local" meaning on the web server rather than
the IMAP server. Web-based e-mail has a lot of appeal: since a browser
is sufficient as a client, the clients are already deployed much more
widely than any specific e-mail client. Some organizations may well
try to offer a mail-specific client for on-site use and web access to
the same mail store for remote access.

LDAP

LDAP is a protocol (the Lightweight Directory Access Protocol) being
incorporated in some clients as an Internet way for the client to get
information about e-mail addresses from a server, i.e. to give you the
capability to type in someone's name and have the mail client software
retrieve the address from a server-based directory. LDAP also has
other uses. There are plans to incorporate LDAP clients into some IMAP
and POP clients. LDAP is essentially an Internet-based, simplified
X.500-like protocol and one of the original intentions of its creators
was to be gatewayed to X.500, thus giving relatively simple Internet
clients access to X.500 servers. Both LDAP and X.500 provide a method
for naming, retrieving, and searching fields in a directory, but do
not define the field-names or what is supposed to go in the fields.
Thus server/client interoperability requires further conventions.

Java

Java is a programming language currently (1996) touted as a tool for
web-based applications. It can affect the use of LAN protocols in a
number of ways: first of all, POP or IMAP clients can be written in
Java, using its cross-platform development capabilities to create
version for a number of platforms. Second, clients could be written as
"Applets", i.e. applications designed to be downloaded into web
browsers such as Netscape from a server. With such a design, a user
would only need access to a web browser to see their e-mail, e.g. drop
into a library and see your e-mail from one of its Internet-browser
kyosks. Applets are not normally allowed to access the
client-machine's disk files (which would result in too much risk when
browsing the Internet from the kind of people who develop computer
viruses), so such an application fits a little better into the IMAP
model (server storage of e-mail folders) than the POP model (client
storage of e-mail folders). Thirdly, Applets enable more practical use
of e-mail clients that use non-standard protocols rather than POP or
IMAP; interoperability is achieved because the server itself
distributes a compatible client applet right when the user accesses
the server.
_________________________________________________________________

List of Protocols and RFCs

Note: for up-to-date information on the RFCs, get an index from an RFC
repository. For up-to-date information on the state of each RFC as to
the Internet Standards, see the most recent RFC called "Internet
Official Protocol Standards".

Name: Simple Mail Transfer Protocol
Nickname: SMTP
Document: RFC 821 (Postel, August 1982)
TCP-port: 25
Status: According to RFC 2000 (2/97), Standard/Recommended (STD 10);
Virtually universal for IP-based e-mail systems.

Name: Post Office Protocol, Version 2
Nickname: POP2
Document: RFC 937 (Butler et al, February 1985)
TCP-port: 109
Status: According to RFC 2000 (2/97), Historic/Not Recommended;
Functionally replaced by incompatible POP3 but likely to be
used at a few sites.

Name: Post Office Protocol, Version 3
Nickname: POP3
Document: RFC 1939 (Myers & Rose, May 1996)
TCP-port: 110 (109 also often used)
Status: According to RFC 2000 (2/97), Standard/Elective (STD 53);
In common use.
Sites: UC Irvine, MIT
Old Docs: RFC 1725.

Name Post Office Protocol, Version 3 Authentication command
Nickname: POP3 AUTH
Document: RFC1734 (Myers, December 1994)
Status: According to RFC 2000 (2/97), Proposed/Elective.

Name: Post Office Protocol, Version 3 Extended Service Offerings
Nickname: POP3 XTND
Document: RFC 1082 (Rose, November 1988)

Name: Distributed Mail Service Protocol
Nickname: DMSP, Pcmail
Document: RFC 1056 (Lambert, June 1988)
TCP-port: 158
Status: According to RFC 2000 (2/97), Informational;
Used very little
Sites: MIT

Name: Interactive Mail Access Protocol, Version 2
Nickname: IMAP2
Document: RFC 1176 (Crispin, August 1990)
TCP-port: 143
Status: According to RFC 2000 (2/97), Experimental/Limited Use;
In use, being replaced by upward-compatible IMAP4(rev1).
Sites: Stanford, U Washington

Name: Interactive Mail Access Protocol, Version 2bis
Nickname: IMAP2bis
TCP-port: 143
Status: Experimental, but in use, being replaced by upward-compatible
IMAP4(Rev1); No RFC.

Name: Interactive Mail Access Protocol, Version 3
Nickname: IMAP3
Document: RFC 1203 (Rice, February 1991)
TCP-port: 220
Status: According to RFC 2000 (2/97) "Historic(Not Recommended)";
No one uses it.
Sites: Stanford

Name: Internet Message Access Protocol, Version 4
Nickname: IMAP4
Document: RFC 1730 (Crispin, December 1994)
TCP-port: 143
Status: According to RFC 2000 (2/97) "Obselete Proposed/Elective
Protocol" obseleted by IMAP4rev1"; Implementations exist,
being replaced by revised version IMAP4rev1.
Sites: U Washington
Related: RFC 1731 (Myers, December 1994),
RFC 1732 (Crispin, December 1994),
RFC 1733 (Crispin, December 1994)

Name: Internet Message Access Protocol, Version 4rev1
Nickname: IMAP4rev1
Document: RFC 2060 (Crispin, December 1996)
TCP-port: 143
Status: According to RFC 2000 (2/97) "Proposed/Elective Protocol";
Implementations exist and more are in progress.
Sites: U Washington
Related: RFC 2061 (Crispin, December 1996),
RFC 2062 (Crispin, December 1996)

Name: Interactive Mail Support Protocol
Nickname: IMSP
Document: Draft RFC: ? (Myers, June 1995)
TCP Port: 406
Status: Experimental, renamed ACAP
Sites: Carnegie Mellon

Name: Application Configuration Access Protocol
Nickname: ACAP
Document: Draft RFC: ? (Myers, June 1996)
Status: ?
Sites: Carnegie Mellon

Note: The "I" in IMAP used to stand for "Interactive". Now it stands
for "Internet" and the "M" stands for "Message" rather than "Mail".
Also, Internet drafts are available at ds.internic.net, munnari.oz.au,
and nic.nordu.net in directory internet-drafts. IMAP2bis is
essentially an early version of IMAP4.
_________________________________________________________________

Other Sources of Information

My own info
http://web.syr.edu/~jmwobus/lans/#imappop
http://web.syr.edu/~jmwobus/internet/

The IMAP Connection web site

http://www.imap.org
Main page

http://www.imap.org/products.html
List of IMAP implementations

http://www.imap.org/imap.vs.pop.brief.html
Outlines differences between IMAP and POP.

http://www.imap.org/imap.vs.pop.html
Same, with more detail.

http://www.imap.org/biblio.html
Bibliography of IMAP Documents.

Information from University of Washington
http://www.washington.edu/imap/

By anonymous ftp from ftp.cac.washington.edu
mail/* (miscellaneous information)

Information from andrew2.andrew.cmu.edu

http://andrew2.andrew.cmu.edu/cyrus/ema ... -IMAP.html
List of IMAP clients

http://andrew2.andrew.cmu.edu/cyrus/acap/acap.html
The ACAP Home Page

NCSU IMAP Resources
http://www.ncsu.edu/imap/

Mailing lists:
pop@jhunix.hcf.jhu.edu
imap@cac.washington.edu
CW-EMAIL@EARNCC.EARN.NET

By anonymous ftp from rtfm.mit.edu
This memo
comp.os.msdos.mail-news FAQ Memo
ftp://rtfm.mit.edu/pub/usenet/comp.os.m ... news/intro and
ftp://rtfm.mit.edu/pub/usenet/comp.os.m ... s/software
Mini FAQ on client-server mail protocols (similar to this memo
but shorter and more practical)
ftp://rtfm.mit.edu/pub/usenet/news.answ ... client-faq
(also on web at http://www.etext.org/~pauls/mailclientfaq.txt)

By the web from http://www.faqs.org
This memo
comp.os.msdos.mail-news FAQ Memo
http://www.faqs.org/faqs/msdos-mail-news/intro/ and
http://www.faqs.org/faqs/msdos-mail-news/software/

Consortium
"The IMAP Consortium" (Getting under way as of March 1995).

Page on MAPI API
http://www.wp.com/davidb/emapi.html
_________________________________________________________________

Capabilities of Well-known mail clients

This section covers what I've been able to find out so far about the
well-known mail clients' ability to retrieve mail from a POP or IMAP
server.

Client POP3 IMAP MIME
------ ---- ---- ----
Apple PowerMail client ?. ?. ?.
BeyondMail Professional 3.0 yes planned- yes
CE QuickMail LAN client no no yes
CE QuickMail Pro client yes planned yes
Claris Emailer yes ? yes
DaVinci eMAIL client yes* ? yes*
Eudora yes yes| yes
FirstClass ? ? ?
Lotus cc:Mail Client R8 yes yes yes
Lotus Notes mail client 4.0 yes planned_ yes
Microsoft Mail client no no no
Microsoft Exchange client yes+ no yes&
Microsoft Outlook 97 yes no yes
Microsoft Outlook 98# yes yes yes
Netscape Navigator yes no yes
Netscape Communicator= yes yes yes
Novell Groupwise yes planned^ yes

Notes:
(.) Discontinued.
(-) IMAP4, target delivery: 4th quarter 1997.
(_) Lotus Notes mail client IMAP4 due 4th quarter 1997.
(*) DaVinci SMTP eMAIL: I'm not sure if this is different from
the normal DaVinci client.
(|) Eudora Pro 4.0 IMAP4.
(+) POP requires Internet Mail Client for Exhange, downloadable from
http://www.windows.microsoft.com or included in "Microsoft Plus".
Due to be integrated, 1st quarter 1997.
(&) qp/base64. Due to be integrated (IMAP4) 3rd quarter 1997.
(=) Due 2nd quarter, 1997.
(^) Due 3rd quarter 1997.
(#) In beta as of November 1997.


_________________________________________________________________

List of Implementations

Note: http://www.etext.org/~pauls/mailclientfaq.txt has a list that is
more concise and less daunting. Also, while this list includes any
IMAP software I hear about, http://www.imap.org/products.html offers a
better list of IMAP implementations. See the section above on Other
Sources of Information for other documents with such lists & charts.


Prot Computer Implementation End MIME Source
------ ---------- ------------------- ---- ---- -------------------------------
POP3u Unix Cyrus ? srvr na 3/12/96
POP2 HP3000/MPE NetMail/3000 srvr na 3K Associates
POP3 ? NetMail/3000 srvr na 3K Associates
POP? MacOS byupopmail clnt ? ?
POP? MacOS MEWS clnt ? ?
POP3 MacOS HyperMail ? ? ?
POP3 MS-DOS TechMail(future) clnt ? ?
POP? OS/2 Yarn/Souper(?) clnt ? ? 1/16/96
POP? OS/2 Popclient clnt yes ? 1/19/96
POP? OS/2 Emacs 19.xx clnt yes ? 1/19/96
POP? OS/2 lampop(?) clnt ? ? 1/26/96
POP2 Unix USC-ISI popd srvr na ? 10/24/94
POP2 MacOS MacPOP 1.5 clnt ? ? 10/24/94
POP2 MS-DOS PC POP 2.1 clnt ? ? 10/24/94
POP3 NT Metainfo/Intergate srvr na ? 11/26/96
IMAP2 TOPS20 MAPSER srvr na ? 11/7/93
POP3 MacOS Powertalk ? ? ? 11/7/95
POP3 Unix mush 7.2.5 clnt ? ? 12/16/94
POP3 WIN? Mailcall chkr na ? 6/11/96
POP3 WIN? Mailcheck chkr na ? 6/11/96
IMAP? Unix Elm clnt ? ? 7/15/96
POP3 WIN95 Agent clnt ? ? 7/23/96
POP3 ? pop-perl5 clnt ? ? 7/23/96
POP3 MacOS/AOCE MailConnect clnt yes ? 7/5/95
POP23 Unix/EMACS RMAIL clnt no ? 8/2/95
POP23k UnixX exmh clnt yes ? 8/8/95
POP? MS-DOS PC POP clnt ? ?Bill Schweickert/Sterling Fed
IMAP? MacOS MailDrop 1.1 clnt ? ackmo.baylor.edu 3/22/96
IMAP2? MacOS MailDrop 1.2d7f clnt ? ackmo.baylor.edu 6/9/97
IMAP4 PalmPilot MultiMail Discovery clnt ? Actual http://www.actualsoft.com 2/3/9
8
POP3 PalmPilot MultiMail Discovery clnt ? Actual http://www.actualsoft.com 2/3/9
8
IMAP4 PalmPilot MultiMail Pro clnt ? Actual http://www.actualsoft.com 2/3/9
8
POP3 PalmPilot MultiMail Pro clnt ? Actual http://www.actualsoft.com 2/3/9
8
IMAP? MS-WIN Air Mail ? ? AIR Co. Ltd http://www.air.co.j
p 9/3/97
POP3 MacOS Marionet 1.0 srvr na Allegiant 6/12/96 (http://www.allegian
t.com)
DMSP Unix Pcmail 3.1 reposit. srvr na allspice.lcs.mit.edu
DMSP PC pc-epsilon (3.1) clnt ? allspice.lcs.mit.edu
DMSP Unix/EMACS Pcmail 4.2 clnt ? allspice.lcs.mit.edu
DMSP PC pc-reader clnt ? allspice.lcs.mit.edu
DMSP PC pc-netmail (3.1) clnt ? allspice.lcs.mit.edu
IMAP MacOS AIMS 2.1 (fut) srvr ? Apple 10/17/96
POP3r MacOS AIMS 1.1.1 srvr na Apple 10/17/96
POP3r MacOS AIMS 2.0 (fut: '97) srvr ? Apple 10/17/96
POP3r MacOS AIMS 2.1 (fut) srvr ? Apple 10/17/96
POP3r MacOS AIMS 1.0 srvr na Apple 10/27/95
POP3r MacOS AIMS 1.1 srvr na Apple 5/21/96 (http://www.cybertech.ap
ple.com)
POP3 MacOS Cyberdog 2.0 clnt ? Apple 5/21/97
POP3r MacOS AppleShare IP 5.0 srvr na Apple appleshareip.com 4/3/97
POP? ? Applixware ? ? Applix 6/24/96
POP3 ? VA Workgroup clnt yes Ashmount 4/30/96 http://www.asn
mount.com
POP3 ? VA Professional clnt yes Ashmount 4/30/96 http://www.asn
mount.com
IMAP2 Solaris MMail clnt yes Atelier de Software Ltd. 5/21/9
6
IMAP2 MacOS MMail (planned) clnt yes Atelier de Software Ltd. 5/21/9
6
POP? OpenVMS PathWay f OpnVMS3.0 srvr ? Attachmate http://www.attchmate.com 10
/21/97
POP3 WIN3/95/NT Emissary Office 1.1 clnt yes Attachmate 7/29/96
IMAP24 WIN3/95/NT Siren Mail 4.1 clnt yes Avistar http://www.siren.com 6/24/98
IMAP24 Sun/Motif Siren Mail 4.1 clnt yes Avistar http://www.siren.com 6/24/98
IMAP24 MacOS Siren Mail 4.1 clnt yes Avistar http://www.siren.com 6/24/98
POP3 DOSWIN BeyondMail clnt yes Banyan (beyondmail.banyan.com)
2/6/96
IMAP4 ? BeyondMail (future) clnt yes Banyan (beyondmail.banyan.com)
9/6/96
POP3 MacOS Bluto clnt yes Bare Bones http://www.barebones.com 3/
31/97
IMAP? MacOS MailDrop 2 (dev) clnt ? Baylor 1/19/96
POP23 MS-WIN BW-Connect clnt no Beame & Whiteside 8/4/94
POP3 MS-DOSk nos11c-a.exe srvr na biochemistry.bioc.cwru.edu 9/16
/94
POP3 MS-DOSk pop3serv srvr na biochemistry.crwu.edu
IMAP? MS-DOSp POPMail/PC 3.2.2 clnt ? boombox.micro.umn.edu 1/11/94
POP2 MacOS MailStop 1.1.3 srvr na boombox.micro.umn.edu 1/18/94
POP2 Unix U Minn popd 1.5c srvr na boombox.micro.umn.edu 11/19/93
POP3 MS-DOSk pop3nos v1.86 srvr na boombox.micro.umn.edu 12/3/93
POP2 MS-DOSk net091b srvr na boombox.micro.umn.edu 12/3/93
IMAP2 MacOS POPmail 2.09b clnt ? boombox.micro.umn.edu 9/15/95
POP2 MS-DOSp POPMail 3.2.2 clnt ? boombox.micro.umn.edu 9/15/95
POP3 MS-WINw5 POPmail/Lab clnt ? boombox.micro.umn.edu 9/15/95
IMAP? MS-DOSp POPMail 3.2.3 beta2 clnt ? boombox.micro.umn.edu 9/15/95
POP23 MacOS POPmail 2.2 clnt ? boombox.micro.umn.edu 9/15/95
POP MacOS POPmail 1.7 clnt ? boombox.micro.umn.edu 9/15/95
POP3 MacOS POPmail/Lab clnt ? boombox.micro.umn.edu 9/15/95
IMAP2 MacOS POPmail 2.2 clnt ? boombox.micro.umn.edu 9/15/95
POP23 MacOS POPmail 2.09b clnt ? boombox.micro.umn.edu 9/15/95
POP2 MS-DOSp POPMail 3.2.3 beta2 clnt ? boombox.micro.umn.edu 9/15/95
POP2 Unix/HP9k hp9000_popd srvr na boombox.micro.umn.edu 9/15/95
IMAP2 MS-WINw POPmail clnt ? boombox.micro.umn.edu 9/15/95
POP2 Unix/AIX aix_new_popd srvr na boombox.micro.umn.edu 9/15/95
POP23 MS-WINw POPmail clnt ? boombox.micro.umn.edu 9/15/95
POP3 MS-WINw ws_gmail srvr na buckshot.usma.edu 9/16/94
POP? UnixX11 xfmail 1.2 clnt yes burka.netvision.net.il 1/16/98
IMAP4 UnixX11 xfmail 1.2 clnt yes burka.netvision.net.il 1/16/98
IMAP41 UnixX11 xfmail 1.2 clnt yes burka.netvision.net.il 1/16/98
IMAP4 ? Futr Andrew Msg Sys ? ? Carnegie-Mellon 9/20/94
POP3 Unix Mail*Hub srvr ? CDC 10/23/96 http://www.cdc.com
IMAP4 Unix Mail*Hub srvr ? CDC 10/23/96 http://www.cdc.com
POP3 ? QM-Internet Gateway ? ? CE Software 6/24/96
POP3 WIN95/NT QuickMail Pro 1.6 clnt yes CE Software http://www.cesoft.com 4/11
/97
POP3 WIN95/NT QuickMail Pro 1.6 srvr ? CE Software http://www.cesoft.com 4/11
/97
POP3 MacOS QuickMail Pro 1.6 clnt yes CE Software http://www.cesoft.com 4/11
/97
POP3 Unix QuickMail Pro 1.6 srvr ? CE Software http://www.cesoft.com 4/11
/97
POP3 OS/2 QuickMail Pro 1.6 srvr ? CE Software http://www.cesoft.com 4/11
/97
IMAP? ? QuickMail Pro (fut) clnt ? CE Software http://www.cesoft.com 8/9/
96
POP3 ? QuickMail POP (fut) clnt ? CE Software http://www.cesoft.com 8/9/
96
POP3 MacOS LeeMail 2.0.2 (shw) clnt ? chs.cusd.claremont.edu 10/12/93
POP3 MacOS OfficeMail srvr na Claris http://www.claris.com 6/6/96
POP3 MacOS Emailer 2.0 clnt yes Claris http://www.claris.com 7/14/97
POP3 MacOS Emailer 1.1 clnt yes Claris http://www.claris.com 7/29/96
IMAP? Unix/X Cyrus (dev on hold) clnt yes CMU 10/4/94
IMAP4 MS-WIN32 Pronto97 clnt yes CommTouch http://www.comtouch.com 3/13
/97
POP3 MS-WIN32 Pronto97 clnt yes CommTouch http://www.comtouch.com 3/13
/97
POP3 MS-WINw Pronto Mail 2.01 clnt yes Commtouch http://www.comtouch.com 4/24
/96
POP3 WIN3/95 Pronto Mail 2.0 clnt yes CommTouch http://www.comtouch.com 7/29
/96
IMAP MS-WINw Pronto clnt yes Commtouch http://www.comtouch.com 9/5/
95
POP3 OS/2 PowerWeb Server++ srvr na CompuSource 4/16/96 http://www.
compusource.co.za
POP3 Linux IntraStore srvr yes Control Data Corp intrastore.cd
c.com 1/18/99
IMAP4 Linux IntraStore srvr yes Control Data Corp intrastore.cd
c.com 1/18/99
POP3 NT IntraStore srvr yes Control Data Corp intrastore.cd
c.com 1/18/99
IMAP4 NT IntraStore srvr yes Control Data Corp intrastore.cd
c.com 1/18/99
POP3 UnixSHA IntraStore srvr yes Control Data Corp intrastore.cd
c.com 1/18/99
IMAP4 UnixSHA IntraStore srvr yes Control Data Corp intrastore.cd
c.com 1/18/99
POP3 ? IntraStore Srvr 97 srvr yes Control Data Corp http://www.cdc.om 3/
13/97
IMAP4 ? IntraStore Srvr 97 srvr yes Control Data Corp http://www.cdc.om 3/
13/97
POP3 WIN32 BeyondMail Pro Int clnt yes Coordinate http://www.coordinate.com 3
/13/97
POP3 Unix BeyondMail clnt 3.0 clnt yes Coordinate http://www.coordinate.com 4
/11/97
POP3 NT BeyondMail srvr 3.0 srvr ? Coordinate http://www.coordinate.com 4
/11/97
POP3 OS/2 BeyondMail clnt 3.0 clnt yes Coordinate http://www.coordinate.com 4
/11/97
POP3 Unix BeyondMail srvr 3.0 srvr ? Coordinate http://www.coordinate.com 4
/11/97
POP3 WIN95/NT BeyondMail clnt 3.0 clnt yes Coordinate http://www.coordinate.com 4
/11/97
POP3 MacOS BeyondMail clnt 3.0 clnt yes Coordinate http://www.coordinate.com 4
/11/97
POP3 Vines BeyondMail srvr 3.0 srvr ? Coordinate http://www.coordinate.com 4
/11/97
POP3 ? cucipop (future) srvr na cuci.nl 8/6/96
IMAP? MacOS Mulberry 1.1 clnt ? CyDaSoft 12/19/96
IMAP2b MacOS Mulberry 1.2 clnt yes Cyrusoft http://www.cyrusoft.com 7/14/
97
POP3 Win95/NT Mulberry 1.2 clnt yes Cyrusoft http://www.cyrusoft.com 7/14/
97
IMAP41 Win95/NT Mulberry 1.2 clnt yes Cyrusoft http://www.cyrusoft.com 7/14/
97
IMAP2b Win95/NT Mulberry 1.2 clnt yes Cyrusoft http://www.cyrusoft.com 7/14/
97
POP3 MacOS Mulberry 1.2 clnt yes Cyrusoft http://www.cyrusoft.com 7/14/
97
IMAP41 MacOS Mulberry 1.2 clnt yes Cyrusoft http://www.cyrusoft.com 7/14/
97
? ? Mulberry 1.3 (fut) clnt yes Cyrusoft 9/3/97
IMSP ? Mulberry 1.3 (fut) clnt yes Cyrusoft 9/3/97
IMAP? ? Mulberry 1.3 clnt yes 1/13/98
POP23k UnixX dxmail/mh clnt ? DEC
POP3 MacOS NetAlly srvr na Delphic (http://www.delphic.com) 11/17
/95
POP3 WIN95 Windis32 srvr na Demon Internet 6/6/96 (http://www.demo
n.co.uk)
POP3r NT MAILbus Internet(b) srvr na Digital 2/20/96 (http://www.digital.co
m)
POP3r DEC UNIX MAILbus Internet(b) srvr na Digital 2/20/96 (http://www.digital.co
m)
POP3 NT MAILbus Internet srvr na Digital 2/20/96 (http://www.digital.co
m)
POP3 DEC UNIX MAILbus Internet srvr na Digital 2/20/96 (http://www.digital.co
m)
IMAP? ? ? srvr ? Digital 2/20/97
IMAP? ? Altavista Mail Srv srvr ? Digital altavista.digital.com 4
/4/97
IMAP2b Unix imapperl-0.6 clnt ? dnpap.et.tudelft.nl 2/6/96
IMAP WIN? ? clnt ? Email connection 12/8/95
POP3 NT sendmail/POP3 srvr na emwac.ed.ac.uk 12/5/95 (http://www.emw
ac.ed.ac.uk)
IMAP4 NT sendmail/POP3 (fut) srvr ? emwac.ed.ac.uk 5/21/96 (http://www.emw
ac.ed.ac.uk)
POP3 OS/2 TCP/2 ADV CLIENT clnt ? Essex Systems
DMSP OS/2 TCP/2 clnt ? Essex Systems
POP2 OS/2 TCP/2 SERVER PACK srvr na Essex Systems
POP3 OS/2 TCP/2 SERVER PACK srvr na Essex Systems
DMSP OS/2 TCP/2 ADV CLIENT clnt ? Essex Systems
DMSP OS/2 TCP/2 SERVER PACK srvr na Essex Systems
IMAP2 MS-DOS ECSMail DOS clnt yes ESYS Corp http://www.esys.ca 12/16/96
IMAP2 Unix/XM ECSMail Motif clnt yes ESYS Corp http://www.esys.ca 12/16/96
IMAP? NT ECSMail clnt yes ESYS Corp http://www.esys.ca 12/16/96
IMAP2b MacOS ECSMail clnt yes ESYS Corp http://www.esys.ca 12/16/96
IMAP2b MS-WINw ECSMail clnt yes ESYS Corp http://www.esys.ca 12/16/96
IMAP2b Solaris ECSMail clnt yes ESYS Corp http://www.esys.ca 12/16/96
IMAP? OS/2 ECSMail OS/2 clnt yes ESYS Corp http://www.esys.ca 12/16/96
IMAP4 ? SIMEON SERVER srvr ? ESYS Corp http://www.esys.ca 8/15/96
IMAPb4 MacOS SIMEON 4.1 clnt yes ESYS Corp http://www.esys.ca 8/5/96
IMAPb4 Unix/Motif SIMEON 4.1 clnt yes ESYS Corp http://www.esys.ca 8/5/96
IMAPb4 MS-WIN SIMEON 4.1 clnt yes ESYS Corp http://www.esys.ca 8/5/96
IMAPb4 WIN32 SIMEON 4.1 clnt yes ESYS Corp http://www.esys.ca 8/5/96
IMAPb4 Mac/OT SIMEON 4.1 clnt yes ESYS Corp http://www.esys.ca 8/5/96
IMSP ? SIMEON ? clnt yes ESYS Corp http://www.esys.ca 9/3/97
IMAP41 ? Execmail clnt yes Execmail http://www.execmail.com 1/15/
99
POP3 ? Execmail clnt yes Execmail http://www.execmail.com 1/15/
99
IMAP41 ? Execmail srvr yes Execmail http://www.execmail.com 1/15/
99
POP3 ? Execmail srvr yes Execmail http://www.execmail.com 1/15/
99
POP23 MS-WINnpo Super-TCP for W e.0 clnt yes Frontier Technologies 6/10/94
POP? MS-WINnpo Super-TCP for W e.0 srvr yes Frontier Technologies 7/12/94
POP3 WIN3/95/NT SuperHghwy Access 2 clnt yes Frontier Technologies 7/29/96
POP3t MS-DOSnpo PC/TCP clnt ? FTP Software
POP2 MS-DOS PC/TCP clnt ? FTP Software
DMSP OS/2 PC/TCP clnt ? FTP Software
POP2 OS/2 PC/TCP for OS/2 clnt ? FTP Software 11/2/93
POP3 OS/2 PC/TCP for OS/2 clnt ? FTP Software 11/2/93
POP? WIN32 Mail OnNet (OnNet32)clnt yes FTP Software 5/3/96 (http://www.ftp.co
m)
DMSP PC PC/TCP 2.3 clnt ? FTP Software 8/4/94
IMAP24 MacOS Mailstrom 1.05 clnt no ftp-camis.stanford.edu 5/21/96
IMAP1 Unix imapd 3.2 (obs) srvr na ftp-camis.stanford.edu 7/13/95
IMAP2b Unix/XM ML 1.3.1 clnt yes ftp-camis.stanford.edu 7/13/95
POP3r OS/2 popsrv10.zip srvr na ftp-os2.mnsu.edu 3/15/96
? OS/2 lamailpop ? ? ftp-so2.cdrom.com
POP3 MS-DOSp NUPop 2.02 clnt no ftp.acns.nwu.edu 1/18/94
POP3 MS-DOSp NUPop 1.03 clnt no ftp.acns.nwu.edu 11/5/93
POP3 MS-DOSp NUPop 2.10 (alpha) clnt yes ftp.acns.nwu.edu 6/10/94
IMAP41 Unix Cyrus 1.5 srvr yes ftp.andrew.cmu.edu 3/21/97
IMAP Unix Cyrus 1.1 srvr ? ftp.andrew.cmu.edu 3/21/97
KPOP Unix Cyrus 1.5 srvr na ftp.andrew.cmu.edu 3/21/97
KPOP Unix Cyrus 1.5.2 srvr na ftp.andrew.cmu.edu 3/21/97
POP3k Unix Cyrus 1.5 srvr na ftp.andrew.cmu.edu 3/21/97
POP3k Unix Cyrus 1.5.2 srvr na ftp.andrew.cmu.edu 3/21/97
POP3 Unix Cyrus 1.4 srvr na ftp.andrew.cmu.edu 3/21/97
IMAP Unix Cyrus 1.4 srvr yes ftp.andrew.cmu.edu 3/21/97
KPOP Unix Cyrus 1.4 srvr na ftp.andrew.cmu.edu 3/21/97
IMAP41 Unix Cyrus 1.5.2 srvr yes ftp.andrew.cmu.edu 3/21/97
IMAP41 Unix/EMACS BatIMail clnt ? ftp.andrew.cmu.edu 3/24/98
POP3k Unix popper-1.831k srvr na ftp.brown.edu 4/11/97
POP3k MacOS Eudora 1.3a8k clnt ? ftp.brown.edu 8/19/94
IMAP24 Unix Pine 3.91 clnt yes ftp.cac.washington.edu 10/14/94
IMAP24 MS-DOSl+ PC-Pine 3.91 clnt yes ftp.cac.washington.edu 10/14/94
IMAP24 PC PC-Pine 4.05 clnt yes http://www.washington.edu/pine 1/15/99
IMAP4 ? imap-4 srvr yes ftp.cac.washington.edu 10/25/96
POP3u ? imap-4 srvr na ftp.cac.washington.edu 10/25/96
POP3u ? imap-4.1 ALPHA srvr na ftp.cac.washington.edu 10/25/96
IMAP4 ? imap-4.1 ALPHA srvr yes ftp.cac.washington.edu 10/25/96
IMAP? Unix MS clnt no ftp.cac.washington.edu 11/7/93
POP3 NeXT EasyMail clnt yes ftp.cac.washington.edu 11/7/93
IMAP2 NeXT MailManager srvr yes ftp.cac.washington.edu 11/7/93
POP2 Unix imapd/ipop2d 3.4 srvr na ftp.cac.washington.edu 12/13/94
POP3 Unix imapd/ipop3d 3.4 srvr na ftp.cac.washington.edu 12/13/94
IMAP2b Unix imapd 3.4/UW srvr ? ftp.cac.washington.edu 12/13/94
POP23 Unix imap kit srvr na ftp.cac.washington.edu 2/15/94
IMAP2 Unix imap kit srvr na ftp.cac.washington.edu 2/15/94
POP23 Unix IPOP srvr na ftp.cac.washington.edu 2/23/96
IMAP2b Unix imapd 3.6.BETA srvr ? ftp.cac.washington.edu 4/25/95
IMAP2b Unix imapd 3.5/UW srvr ? ftp.cac.washington.edu 4/25/95
IMAP4 Unix imap4 kit (alpha) srvr na ftp.cac.washington.edu 5/31/95
IMAP24 Unix Pine 4.0 (future) clnt yes ftp.cac.washington.edu 7/30/96
IMAP2b Unix Pine 3.95 clnt yes ftp.cac.washington.edu 7/30/96
IMAP24 Unix Pine 3.90 clnt yes ftp.cac.washington.edu 9/23/94
IMAP24 MS-DOSl+ PC-Pine 3.90 clnt yes ftp.cac.washington.edu 9/23/94
POP3 MacOS MacPOP (Berkeley) clnt ? ftp.cc.berkeley.edu
POP3 Unix popper-1.831 srvr na ftp.cc.berkeley.edu 4/11/97
POP? Unix popmail clnt ? ftp.cic.net 2/9/96
POP3 MS-WINp wnqvtnet 3.0 clnt ? ftp.cica.indiana.edu
POP3 MS-WINp wnqvtnet 3.9 clnt ? ftp.cica.indiana.edu 2/15/94
POP NeXT OS BlitzMail srvr na ftp.dartmouth.edu 10/23/95
POP AIX BlitzMail (in dev) srvr na ftp.dartmouth.edu 10/23/95
POP DEC OSF/1 BlitzMail srvr na ftp.dartmouth.edu 10/23/95
POP3 ? PopGate gway na ftp.esi sys.com 1/19/96
POP23k Unix mh-6.8 (UCI RandMH) both yes ftp.ics.uci.edu 8/30/94
POP23krUnix mh-6.8.3 (UCI RndMH)both yes ftp.ics.uci.edu 9/27/94
POP? Unix popc clnt ? ftp.imag.fr 2/9/96
POP3 VMS IUPOP3 v1.8-1 srvr na ftp.indiana.edu 7/25/94
POP3 VMS IUPOP3 v1.7-CMU-TEK srvr na ftp.indiana.edu 7/25/94
POP3 VMS IUPOP3 v1.7 srvr na ftp.indiana.edu 7/25/94
POP3 MS-DOS POP3 0.9 clnt na ftp.indiana.edu 7/25/94
POP? Unix gwpop clnt ? ftp.pasteur.fr 2/9/96
POP23 MS-WINw Trumpet clnt no ftp.psychol.utas.edu.au 7/7/94
POP3u Unix qpopper 2.1.4-r3 srvr na ftp.qualcomm.com 4/11/97
POP3u Unix qpopper 2.1.3-r5 srvr na ftp.qualcomm.com 4/11/97
POP3u Unix qpopper 2.2 srvr na ftp.qualcomm.com 4/11/97
POP3 Unix popperQC3 srvr na ftp.qualcomm.com 4/11/97
POP3u Unix qpopper 2.1.4-r1 srvr na ftp.qualcomm.com 4/11/97
POP3 MS-WINw Eudora 1.4.4 clnt yes ftp.qualcomm.com 6/23/95
POP3 Macintosh6 Eudora 1.3.1 clnt no ftp.qualcomm.com 7/14/94
POP3 Unix popper.rs2 srvr na ftp.qualcomm.com 8/4/95
POP3 MS-WINw Eudora 1.5.2b1 clnt yes ftp.qualcomm.com 8/4/95
POP3r MacOS MailShare 1.0fc6 srvr na ftp.qualcomm.com 8/4/95
POP3 Mac7/PM7 Eudora 1.5.3 clnt yes ftp.qualcomm.com 8/4/95
POP3 MS-WIN Pceudora clnt ? ftp.qualcomm.com 9/24/93
POP? MS-WIN RFD Mail 1.22 clnt ? ftp.std.com 7/19/94
POP? MS-WIN RFD Mail 1.23 clnt ? ftp.std.com 9/16/94
POP3 Unix UMT (beta) clnt ? ftp.topaz.kiev.ua 12/29/95 (www
.topaz.kiev.ua)
POP? MS-DOS UCDmail clnt ? ftp.ucdavis.edu 10/24/94
POP2 Unix pop2d 1.001 srvr na ftp.ucdavis.edu 12/3/93
POP3 Unix pop3d 1.004 srvr na ftp.ucdavis.edu 12/3/93
POP? Unix/XO SXMail 0.9.74a (b) clnt ? ftp.uni-stuttgart.de 10/12/95
POP23 Unix/EMACS vm clnt no ftp.uu.net 8/2/95
IMAP? Windows Winbox 3.1 Beta 1 clnt ? ftp.uv.es 12/13/96
POP? Windows Winbox 3.1 Beta 1 clnt ? ftp.uv.es 12/13/96
IMAP AIX imap server srvr ? ftp.wu-wien.ac.at 4/5/95
POP23k Unix popmaild srvr na ftp.wu-wien.ac.at 4/5/95
POP23k UnixX xmh clnt ? ftp.x.org 2/15/94
POP3 Unix perl popper srvr na ftp.xensei.com/users/ccrlphr 9/
15/95
POP23 Win95/NT TeamWARE Embla 2.0+ clnt yes Fujitsu http://www.teamware.us.com 7/1
4/97
IMAP41 Win95/NT TeamWARE Embla 2.0+ clnt yes Fujitsu http://www.teamware.us.com 7/1
4/97
POP3r MacOS MailShare 1.0(beta) srvr na glenn.anderson@stonebow.otago.a
c.nz 8/16/94
IMAP4 Java? A Good Mail Srvr(a) srvr ? goodserver.com http://www.goodserver.c
om 9/5/97
POP3 Java? A Good Mail Srvr(a) srvr ? goodserver.com http://www.goodserver.c
om 9/5/97
POP? Unix movemail clnt ? GNU 2/9/96
POP3a Unix Ishmail clnt yes H&L Software 7/14/97
IMAP4 Unix Ishmail clnt yes H&L Software 7/14/97
POP? OS/2 popsrv99.zip srvr ? hobbes.nmsu.edu 2/15/96
POP3 OS/2 POP3D 14B srvr yes hobbes.nmsu.edu 4/5/96
POP3 OS/2 POP3D 12 srvr yes hobbes.nmsu.edu 6/2/95
POP3 OS/2 PMMail 11 clnt yes hobbes.nmsu.edu 6/2/95
POP3 OS/2 POP3D 14A srvr yes hobbes.nmsu.edu 9/12/95
IMAP DOSWINMac OpenMail (future) clnt ? HP 3/29/96 http://www.openmail.
external.hp.com
POP3 DOSWINMac OpenMail (future) clnt ? HP 3/29/96 http://www.openmail.
external.hp.com
POP3 DSWNMcUnx OpenMail 4.10 clnt yes HP http://www.eco.hp.com 3/13/97
?POP3 NT NT MAIL ? ? http://bhs.com 1/26/96
POP3 ? WIG v2.0 gway ? http://www.demon.co.uk/ 4/19/96
POP3 MS-WIN Mi'Mail clnt yes http://www.irisoft.be 6/30/95
POP3 ? Mailcoach V1.0 srvr na http://www.multi.se/ymex/mailco
ach.htm 6/14/96
POP3r NT SLmailNT srvr na http://www.seattlelab.com/ 3/29
/96
POP3r WIN95 SLmail95 srvr na http://www.seattlelab.com/ 5/14
/96
POP3u NT Exchpop(?) 1.0 gway yes http://www.sts.co.il/pop3.htm 6
/14/96
POP2 VM FAL srvr na IBM
POP2 MS-WIN IBM TCP/IP for DOS clnt no IBM 7/7/94
IMAP Java/JFC ICEMail 2.6 clnt ? ICE Eng. http://www.ice.com 1/15/99
POP Java/JFC ICEMail 2.6 clnt ? ICE Eng. http://www.ice.com 1/15/99
IMAP? MS-WIN EMBLA ? ? ICL ProSystems 9/20/94
IMAP4 ? Intrnt Msging Srvr srvr ? ICL TeamWare 9/8/1
POP3 ? Intrnt Msging Srvr srvr ? ICL TeamWare 9/8/1
POP3 NetWare4 Connect2SMTP srvr ? Infinite Technologies 3/29/96
POP3 DOS C2SMTP srvr na Infinite Technologies 6/11/96
POP3 WIN95/NT ExpressIT! 2000 clnt ? Infinite Technologies http://www.ihub.
com 1/14/97
IMAP WIN95/NT ExpressIT! 2000 clnt ? Infinite Technologies http://www.ihub.
com 1/14/97
IMAP? NT InterChange srvr ? Infinite Technologies http://www.ihub.
com 4/4/97
POP3 Unix PMDF E-mail Interc srvr ? Innosoft 3/13/97 http://www.innosoft.c
om
IMAP4 Unix PMDF E-mail Interc srvr ? Innosoft 3/13/97 http://www.innosoft.c
om
IMAP? MacOS PMDF E-mail Interc clnt ? Innosoft 3/2/94 http://www.innosoft.co
m
IMAP? MS-DOS PMDF E-mail Interc clnt ? Innosoft 3/2/94 http://www.innosoft.co
m
IMAP? VMS Pine in PMDF 4.3 clnt ? Innosoft 4/15/94
IMAP? VMS PMDF E-mail Interc ? ? Innosoft 6/24/96 http://www.innosoft.c
om
POP? VMS PMDF E-mail Interc ? ? Innosoft 6/24/96 http://www.innosoft.c
om
IMAP? OpenVMS PMDF 5.1 srvr ? Innosoft 9/24/96 http://www.innosoft.c
om
POP3r VMS PMDF popstore clnt ? Innosoft 9/24/96 http://www.innosoft.c
om
POP3 OpenVMS PMDF 5.1 srvr na Innosoft 9/24/96 http://www.innosoft.c
om
POP3 VMS PMDF 5.1 srvr na Innosoft 9/24/96 http://www.innosoft.c
om
IMAP? Solaris PMDF 5.1 srvr ? Innosoft 9/24/96 http://www.innosoft.c
om
POP3 DigUNIX PMDF 5.1 srvr na Innosoft 9/24/96 http://www.innosoft.c
om
IMAP? DigUNIX PMDF 5.1 srvr ? Innosoft 9/24/96 http://www.innosoft.c
om
IMAP? VMS PMDF 5.1 srvr ? Innosoft 9/24/96 http://www.innosoft.c
om
POP3 Solaris PMDF 5.1 srvr na Innosoft 9/24/96 http://www.innosoft.c
om
IMAP4 Java J Street Mailer clnt ? InnoVal 4/24/98 http://www.innoval.com
POP3 Java J Street Mailer clnt ? InnoVal 4/24/98 http://www.innoval.com
POP3 MacOS TCP/Connect II clnt ? InterCon Systems Corp
POP3 MS-WIN TCP/Connect II f W clnt yes InterCon Systems Corp 7/8/94
IMAP4 NT NTMail 3.02 srvr ? Internet Shopper http://www.ntmail.co.
uk 7/2/97
POP3 NT NTMail 3.02 srvr ? Internet Shopper http://www.ntmail.co.
uk 7/2/97
POP3 MS-WIN? IMAIL both ? Ipswitch 7/12/94
POP3 MS-WINw IMail srvr na Ipswitch 7/15/94
POP3 MS-WINw IMAIL srvr na Ipswitch 9/16/94
POP3 NT IMail Srvr f NT 3.0 srvr na Ipswitch http://www.ipswitch.com 3/13/
97
IMAP4 NT IMail Server 4.0 srvr ? Ipswitch http://www.ipswitch.com 5/7/9
7
POP3 NT IMail Server 4.0 srvr ? Ipswitch http://www.ipswitch.com 7/2/9
7
POP3 NT N-Plex SMTP srvr ? ISOCOR http://www.isocor.com 9/26/97
IMAP41 NT N-Plex SMTP srvr ? ISOCOR http://www.isocor.com 9/26/97
POP3 MacOS MacMH clnt ? jessica.stanford.edu/info
POP3 OS/2 ? (in testing) srvr no kf5mg@computek.net 11/28/95
POP3r Java shareware Java cls clnt ? Koehn Consulting 8/2/96
IMAP? MacOS Mailstrom clnt ? lindy.stanford.edu 9/22/95
POP3 MS-WINs winelm clnt ? lister.cc.ic.ac.uk 1/25/94
POP3 MS-DOSs pcelm clnt ? lister.cc.ic.ac.uk 1/25/94
POP? MS-WINw Windows ELM clnt ? lister.cc.ic.ac.uk 7/12/94
POP3 ? Lotus Notes 4.5 srv srvr ? Lotus 10/17/97
POP3 WIN3/95/NT Lotus Nts ml cl 4.0 clnt yes Lotus http://www.lotus.com 3/13/97
POP3 Unix Lotus Nts ml cl 4.0 clnt yes Lotus http://www.lotus.com 3/13/97
POP3 OS/2 Lotus Nts ml cl 4.0 clnt yes Lotus http://www.lotus.com 3/13/97
POP3 MacOS Lotus Nts ml cl 4.0 clnt yes Lotus http://www.lotus.com 3/13/97
POP3 ? cc:Mail 8.0 srvr ? Lotus http://www.lotus.com 5/13/97
IMAP4 ? cc:Mail 8.0 srvr ? Lotus http://www.lotus.com 5/13/97
POP3 ? cc:Mail 8.0 clnt ? Lotus http://www.lotus.com 5/28/97
IMAP4 ? cc:Mail 8.0 clnt ? Lotus http://www.lotus.com 5/28/97
POP23 Unix servers w Mail-IT srvr na mail-it@unipalm.co.uk 12/16/94
POP23 MS-WINw Mail-IT 2 clnt yes mail-it@unipalm.co.uk 7/12/94
POP23 Unix Mail-IT 2 clnt yes mail-it@unipalm.co.uk 9/9/94
POP3 MUSIC/SP POPD 1.0 srvr na McGill Univ. Sys. Inc. 01/11/95
POP3 NT Sendmail w POP3 1.1 srvr na MetaInfo http://www.metainfo.com 3/13/
97
POP3 WIN95/NT Calypso clnt yes Micro Computer http://www.mcsdallas.co
m 3/13/97
IMAP4 WIN95/NT Calypso clnt yes Micro Computer http://www.mcsdallas.co
m 3/13/97
POP? MS-? Exchange clnt ? Microsoft 10/24/95
IMAP4 MS-? Exch Server 5.5 srvr yes Microsoft http://www.microsoft.com 1/1
9/99
POP3 MS-? Exch Server 5.5 srvr yes Microsoft http://www.microsoft.com 1/1
9/99
POP3 MS-? Inter. Mail Service gway ? Microsoft 6/4/96 (http://www.microsoft
.com)
POP3 MS-? Inter. Mail & News clnt yes Microsoft 6/4/96 (http://www.microsoft
.com)
IMAP4 ? Internet Expl 4.0 clnt ? Microsoft http://www.microsoft.com 3/1
8/97
POP3 ? Internet Expl 4.0 clnt ? Microsoft http://www.microsoft.com 5/2
1/97
POP3 Win95/NT Outlook Express clnt yes Microsoft http://www.microsoft.com 7/1
4/97
IMAP4 Win95/NT Outlook Express clnt yes Microsoft http://www.microsoft.com 9/5
/97
POP3 Win95/NT Outlook 97 clnt yes Microsoft http://www.microsoft.com 7/1
4/97
POP3 Win95/NT Outlook 98 clnt yes Microsoft http://www.microsoft.com 11/
14/97
IMAP4 Win95/NT Outlook 98 clnt yes Microsoft http://www.microsoft.com 11/
14/97
POP? NT MailSrv from Res K. srvr na Microsoft?
POP23 MS-DOSp Minuet 1.0b18a(beta)clnt no minuet.micro.umn.edu 9/15/95
IMAP? MacOS Mulberry (beta) clnt no mulberry@dial.pipex.com 7/30/96
POP? Unix zpop srvr na NCD 9/15/95
POP? Unix zync ? clnt ? NCD 9/23/94 (http://www.ncd.com)
POP3k MacOS TechMail 2.0 clnt ? net-dist.mit.edu
POP3 MS-WINl TechMail for Wind. clnt ? net-dist.mit.edu 2/25/94
POP3 OS/2l TechMail for Wind. clnt ? net-dist.mit.edu 2/25/94
POP3 Java DartMail clnt yes NetAccent http://www.netaccent.com 2/1
4/97
IMAP4 Java DartMail clnt yes NetAccent http://www.netaccent.com 2/1
4/97
IMAP4 Win3/95/NT DART Mail 1.0 clnt yes NetAccent http://www.netaccent.com 7/1
4/97
IMAP4 OS/2 DART Mail 1.0 clnt yes NetAccent http://www.netaccent.com 7/1
4/97
POP3 Win3/95/NT DART Mail 1.0 clnt yes NetAccent http://www.netaccent.com 7/1
4/97
POP3 OS/2 DART Mail 1.0 clnt yes NetAccent http://www.netaccent.com 7/1
4/97
POP3 Unix DART Mail 1.0 clnt yes NetAccent http://www.netaccent.com 7/1
4/97
IMAP4 MacOS DART Mail 1.0 clnt yes NetAccent http://www.netaccent.com 7/1
4/97
IMAP4 Unix DART Mail 1.0 clnt yes NetAccent http://www.netaccent.com 7/1
4/97
POP3 MacOS DART Mail 1.0 clnt yes NetAccent http://www.netaccent.com 7/1
4/97
POP23 MS-DOSni Chameleon beta clnt yes NetManage
POP23 NT Chameleon V5.0 f NT both ? NetManage 11/28/95
IMAP? Windows? Chameleon (future) clnt ? NetManage 3/19/96
POP23 MS-WINw Internet Chameleon clnt yes NetManage 7/12/94
POP3 WIN3/NT/95 JetMail clnt yes NetManage 7/29/96
IMAP4 WIN3/NT/95 JetMail clnt yes NetManage 7/29/96
POP3 NT Post.Office srvr na NetManage 8/22/96 http://www.netmanage
.com
POP3 Solaris Post.Office srvr na NetManage 8/22/96 http://www.netmanage
.com
POP3 Unix Z-Pop 1.0 srvr na NetManage 8/22/96 http://www.netmanage
.com
POP3 SunOS Post.Office srvr na NetManage 8/22/96 http://www.netmanage
.com
POP3 WIN3/95/NT Z-Mail 4.0.1 clnt yes NetManage 8/23/96 http://www.netmanage
.com
POP3 Unix/line Z-Mail Lite 3.2 clnt yes NetManage 8/23/96 http://www.netmanage
.com
POP3 Unix/curs Z-Mail Lite 3.2 clnt yes NetManage 8/23/96 http://www.netmanage
.com
POP3 Unix/XM Z-Mail Motif 3.2.1 clnt yes NetManage 8/23/96 http://www.netmanage
.com
POP23 MS-DOSni ChameleonNFS both ? NetManage 8/4/94
IMAP4 Unix post.office srvr yes NetManage http://www.netmanage.com 3/1
3/97
POP3 Unix post.office srvr na NetManage http://www.netmanage.com 3/1
3/97
IMAP4 WIN3/95/NT Z-Mail Pro 6.1 clnt yes NetManage http://www.netmanage.com 4/1
1/97
POP3 WIN3/95/NT Z-Mail Pro 6.1 clnt yes NetManage http://www.netmanage.com 4/1
1/97
POP3 MacOS Z-Mail Mac 3.3.1 clnt yes NetManage http://www.netmanage.com 7/1
4/97
POP3 Unix Z-Mail Unix 4.0 clnt yes NetManage http://www.netmanage.com 7/1
4/97
POP3 NT Netscape Mail Srvr srvr na Netscape 12/18/95 (info@netscap
e.com)
POP3 Solaris Netscape Mail Srvr srvr na Netscape 12/18/95 (info@netscap
e.com)
POP3 SunOS Netscape Mail Srvr srvr na Netscape 12/18/95 (info@netscap
e.com)
IMAP4 ? SuiteSpot M S srvr ? Netscape http://www.netscape.com 2/20/
97
IMAP4 NT Netscape M S 2.0(f) srvr ? Netscape http://www.netscape.com 6/21/
96
POP? Solaris Navigator 3.0b4(fut)clnt ? Netscape http://www.netscape.com 6/25/
96
POP3u Win3/95/NT Navigator 2.x clnt yes Netscape http://www.netscape.com 7/29/
96
IMAP4 NT Netscape M S 2.02 srvr ? Netscape http://www.netscape.com 4/4/9
7
IMAP4 OS/2 Communicator PR 2 clnt yes Netscape http://www.netscape.com 7/15/
97
IMAP4 MacOS Communicator PR 2 clnt yes Netscape http://www.netscape.com 7/15/
97
POP3 MacOS Communicator PR 2 clnt yes Netscape http://www.netscape.com 7/15/
97
POP3 Unix Communicator PR 2 clnt yes Netscape http://www.netscape.com 7/15/
97
IMAP4 Unix Communicator PR 2 clnt yes Netscape http://www.netscape.com 7/15/
97
POP3 WIN95/NT Communicator PR 2 clnt yes Netscape http://www.netscape.com 7/15/
97
POP3 OS/2 Communicator PR 2 clnt yes Netscape http://www.netscape.com 7/15/
97
IMAP4 WIN95/NT Communicator PR 2 clnt yes Netscape http://www.netscape.com 7/15/
97
IMAP4 Unix Communicator 4.0x clnt yes Netscape http://www.netscape.com 1/16/
98
POP3 NetWare 4 LAN WorkGroup 5 ???? na Novell http://www.novell.com 1/15/96
POP3 Java Novita Mail clnt ? Novita Comm 12/10/96
IMAP? Java Novita Mail clnt ? Novita Comm 12/10/96
POP3 DOSWINMac DaVinci SMTP eMAIL clnt yes On Technology 4/24/96
POP3 WIN95/NT InterOffice 4.1 clnt no Oracle http://www.oracle.com 7/14/97
IMAP4 WIN95/NT InterOffice 4.1 clnt no Oracle http://www.oracle.com 7/14/97
IMAP? Windows? pcMail (future) clnt ? OzMail 3/19/96
POP3 MS-WIN Open Systems Mail clnt ? Pine Software
POP? MS-WINls TCPMail clnt ? Pinesoft (pinesoft@net.com)
POP3 OpenVMS TCPware Internet Sr srvr na Process Software 12/20/95 (info
@process.com)
POP3 NetWare34 SoftNet WEBserv srvr na Puzzle Systems 12/15/95 (info@p
uzzle.com)
POP3x MS-WIN WinQVT (2.1) clnt ? QPC Software (shareware) 7/12/9
4
POP3r Unix Vers of qpopper srvr na QualComm http://www.qualcomm.com 1/26/
96
POP3 WIN32 Eudora Pro 2.2b8 clnt yes Qualcomm http://www.qualcomm.com 12/5/
95
POP3 Mac Eudora Light 3.1 clnt ? Qualcomm http://www.qualcomm.com 4/11/
97
POP3 Mac Eudora Pro 3.1 clnt yes Qualcomm http://www.qualcomm.com 4/11/
97
IMAP4 ? Eudora Worldmail srvr ? Qualcomm http://www.qualcomm.com 4/4/9
7
POP3 ? Eudora Worldmail srvr ? Qualcomm http://www.qualcomm.com 4/4/9
7
POP3mr Macintosh7 Eudora 2.0.2 clnt yes Qualcomm http://www.qualcomm.com 5/10/
94
POP3u Unix qpo
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