Eudora WorldMail Server  
   Includes questions, updaters, and features. [Windows]
   http://www.eudora.com/worldmail/

Exim  
   Includes a current version download section, mailing lists, documentation and FAQs, website credits, and Y2K information.
   http://www.exim.org

Advox Omnigate 6  
   Combines an e-mail gateway, sms and POP3 server. Includes news, datasheets and overview of products and services.
   http://www.advox.se/

PostFix  
   Open source email server for Unix, IBM Public license.
   http://www.postfix.org/

IA eMailServer  
   Supports mailing list, infoserver, robot and group mailbox features, and has spam control. Includes downloads, rewards, and requirements.
   http://www.tnsoft.com/

MIO Mail Server  
   Large scalable mail server with a calendar, address books, groups, and SyncML synchronization using standard protocols.
   http://www.mobicosoft.com/ensite/mio-mail.html

VPOP3  
   An Internet e-mail server and gateway for small, and medium sized businesses. Has an overview, features, screenshots, prices, download and requirements. [Win95/98/Me/NT/2000]
   http://www.pscs.co.uk/products/vpop3/

Project Cyrus  
   An IMAP server developed at Carnegie Mellon University. (C, Perl) [GNU/Linux, Unix]
   http://asg.web.cmu.edu/cyrus/

IMail Server  
   An SMTP/POP3/IMAP4/LDAP mail server with web interface for messaging and administration. Has anti-spam and anti-virus features. [Windows NT]
   http://www.ipswitch.com/products/imail_server/

Msgs.securepoint.com  
   Searchable archive of the Postfix MTA mailing list.
   http://msgs.securepoint.com/postfix/

Sugarsoft Mail Server  
   A standard SMTP/POP3 server for Windows 95/98/NT with unlimited domains and mailboxes. Features dial-up, mail lists, auto reply, and anti spamming. Uses clean ASCII files.
   http://www.sugarsoft.com/

EzMTS.org  
   Full-featured SMTP/POP3 based email server. Includes features, bugtracker, trial version download, FAQ, mailing list, documentation and source code. [Windows NT4/2000/XP]
   http://www.ezmts.org/

Rockliffe  
   MailSite SMTP, POP3, LDAP3, IMAP4 standards-based Internet e-mail gateways and servers. [WinNT/2000]
   http://www.mailsite.com/

netMailshar  
   Features SMTP/POP3 mail server with auto-dialer, advanced scheduler, autoresponder, message viewer, and email forwarding.
   http://www.pppindia.com/intl/netmailshar/

Interchange Email Server  
   A server-based application integrating with any e-mail system, or a mixed environment containing multiple protocols. Includes information about different gateways, requests, and terms. [Win95/98/NT/2000]
   http://www.ssimail.com/Interchange.htm

Mercury Mail Transport System  
   A free fully RFC-compliant server for Intel platforms. Includes POP3, SMTP, IMAP modules, advanced filtering, advanced mailing-list hosting. [Netware, Win95/98/NT/2000]
   http://www.pmail.com/overviews/ovw_mercury.htm

WZI Consulting: Custom Mail Delivery Solutions  
   Includes chapters on how mail is delivered, fetchmail configuration, fixed IP solutions, sendmail ETRN command, batched SMTP solutions, setting up and testing UUCP.
   http://www.wizzy.com/wizzy/mail.html

Teapop  
   Open source POP3 solution. Free download, documentation, FAQ. [Unix source/RPM]
   http://www.toontown.org/teapop/

XMail  
   Includes free download, full documentation, mailing list, and forum. [Linux, Solaris, Windows NT]
   http://www.xmailserver.org/

Java(tm) Mail Server  
   Runs under Java 2 Runtime Environment. Includes a list of features, original code base, and how-to configure it.
   http://www.jps.at/java/tools/mailserver.html

Nexorplore  
   A high capacity, multi-protocol message server management and security features.
   http://www.nexor.com/messaging_products.asp

PostMaster  
   Features an e-mail messaging system providing multiple individual accounts. Has filtering, spam and permission-based features.
   http://www.mailserve.net/

Kerio MailServer  
   A secure email server with webmail, anti-virus and anti-spam protection, allowing to collaborate via email, shared contacts, calendars and tasks.
   http://www.kerio.com/kms_home.html

Mailgate Ltd  
   Features mail and proxy server, POP3 collection for SMTP only servers for small to medium sized businesses.
   http://www.mailgate.com/

NT Mail Server Seattle Lab Software Review  
   Comprehensive real user review of their mail server and list server software.
   http://nt-mail-server.dallastexas.net/

eXtremail  
   Supports SMTP/POP3/IMAP4 mail protocols. Includes news, history, mailing lists, messageboard, downloads, and FAQ. [Linux]
   http://www.extremail.com/

WorkgroupMail Mail Server  
   Mail server with optional content filtering and server-based virus protection. Free trial version, FAQ, complete documentation, and reseller list. [Windows]
   http://www.workgroupmail.com/

QwikMail SMTP  
   Designed to be a fast, secure, and efficient, simple to configure and maintain. Declares no internal mailer. [Linux]
   http://qwikmail.sourceforge.net/smtpd/

Opcode  
   Free SMTP/POP3 mail server for Windows. Includes information, about installation, configuration, and download.
   http://www.opcode.co.uk/opmail/

MDaemon  
   Scalable Windows email server with built-in spam blocking, content and antivirus filtering. Includes full mailing list functions, remote administration and support for browser based mail clients.
   http://www.ccsoftware.ca/mdaemon

PostMaster Email Server  
   Explains benefits, requirements, downloads for LAN users.
   http://www.postmasteremailserver.com

Burrotech - Office Mail  
   Free POP and SMTP server including aliases, auto-dialling, and internal routing. [Win]
   http://www.burrotech.com/officemail.php

MailEnable  
   Provides details of three different editions of scalable hosted messaging platform for Microsoft Windows.
   http://www.mailenable.com/

INweb Mail Server  
   A POP3/SMTP mail server providing features for small and large businesses, and ISPs. Includes an installation and configuration guide, trial version download, and a list of features.
   http://www.inwebmail.com/

popa3d  
   A tiny Unix POP3 server with security as its primary design goal.
   http://www.openwall.com/popa3d/

Dialog Mail Server  
   Suitable for use as part of a corporate messaging backbone or for implementing mail services for the small workgroup.
   http://www.dialogware.com/

IISPop  
   A POP3 only server, designed to be paired with the SMTP server bundled in Windows 2000/IIS 5. Has support, discussion, and download.
   http://www.curtiscomp.com/iispop

SOHO Mail Server  
   A free small office/home office SMTP/POP3 mail server for Windows with dial-up support and flexible routing rules.
   http://www.sohoserver.co.uk

DAWKCo Software  
   Includes POP3 Server and e-mail routing services, webmail extension for IIS SMTP server, and administration tools.
   http://www.dawkco.com/software/

wodMailServer  
   A set of components to create standalone full mail server system on a network. Contains Pop3Server, ImapServer, SmtpServer and Mailbox components.
   http://www.weonlydo.com/index.asp?showform=MailServer

CapeSoft Email Server  
   Features easy to use control over email domains, mailboxes and aliases for small or medium businesses and home environments. Has history and installation and configuration help. [Windows]
   http://www.capesoft.com/utilities/emailserver/emailserver.htm

Mail Master  
   Designed for unlimited users with integrated anti-virus, user configurable spam-filter, web mail interface, disk quotas, POP3, IMAP, and multi-level management.
   http://www.linuxmailmanager.com/

Isode M-Switch  
   A high performance SMTP message switch. Includes internet messaging, POP3, anti-virus and anti-spam solutions.
   http://www.isode.com/products/m-switch-overview.html

The Newman Group  
   Offers integrated email messaging management solutions.
   http://www.nofailemail.net/

Magic Mail Server  
   A complete installation of all features for Mail Server for the ISP and business market. Includes support for anti-spam techniques, virus scanning, management and user interfaces.
   http://magicmail.linuxmagic.com/

Smail-3  
   Accepts mail messages from local files or remote hosts by SMTP or UUCP, and delivers them to remote hosts or to files or programs on the local machine. Includes features, release information, and support. [Unix]
   http://www.weird.com/~woods/projects/smail.html

Courier mail server  
   An SMTP/IMAP/POP3 and webmail server with extensions for mailing list management and spam filtering. [GNU/Linux, Unix]
   http://www.courier-mta.org

PostConf  
   A web-based, email server and gateway. Includes a documentation, support and demo.
   http://www.postconf.com/

TekGuard  
   Free SMTP mail server and optional MS Outlook PlugIn with C# source code. Receive, filter, identify and eliminate incoming spam mail.
   http://www.TekGuard.com/

Mac OS X Server  
   Makes mail services deliver standards-based email, manage mailing lists and block spam. Also includes a list of other features.
   http://www.apple.com/server/macosx/mail_services.html

Intellipeer  
   Has built-in anti-spam technology, and supports groups and mailing lists. Includes installation procedure, customization, support, and downloads. [Win 2000/XP/2003]
   http://www.intellipeer.com/

Ability Mail Server  
   Has help, configuration and tips section. Supports SMTP, POP3, IMAP4, and WebMail and features remote administration and virus protection. [Windows 98, Me, NT, 2000, XP and 2003]
   http://www.code-crafters.com/abilitymailserver/

Postal Engine  
   Features e-mail products to enable organizations to use standards compliant components to reduce downtime, and increase performance.
   http://www.postalengine.com/

Winmail Server  
   Supports SMTP, POP3, multiple domains, anti-virus, SMTP authentication, remote control, and spam filters. Product description, screenshots, document, FAQs, downloads, and registration information.
   http://www.magicwinmail.net

Binc IMAP  
   GPL licensed IMAP4rev1 server for Maildir, written in C++. It strives to be stable, fast, flexible, and RFC compliant.
   http://bincimap.org/

Outblaze Business Mail Server (OBMS)  
   Product information including FAQ and download.
   http://obms.outblaze.com/admin/index.jsp?lang=us

Business Mail Gateway  
   Allows multi-site working. Includes instructions for installing, popular features, and support forums. Free up to 10 mailboxes. [Win]
   http://greatnetideas.com/bmg/

CMail  
   Enables to send and receive e-mails across the Internet and within LAN. Includes variability of features, screenshots, technical documents, OEM information, and awards. [Win 95/98/NT/Me/2000/XP]
   http://www.computalynx.net/software/cmail/

CommuniGate Pro  
   Features multi-domain support, mailbox accounts with protection mechanisms enabling access to POP3/IMAP4 mail clients.
   http://www.stalker.com/CommuniGatePro/

hMailServer  
   Has webmail, support for virtual domains, anti virus scanning, and distribution lists. Includes features, screenshots, download, forum and documents. [Windows NT/2000/XP]
   http://www.hmailserver.com/

inFusion Mail Server  
   Uses ColdFusion, iHTML or Active State Perl to control mail delivery. [Win95/98/NT/2000]
   http://www.coolfusion.com/products/ims/

IceWarp Email Server  
   Has SMTP/POP3/IMAP4 support, lists, server gateways, web mail, and WAP access.
   http://www.icewarp.com/

Gordano Messaging Server  
   Features Web configuration, proxies, webmail, dialup, anti-spam, anti-virus, Outlook Collaboration, SMTP/ESMTP/POP3/IMAP4. [Linux, Solaris, Windows]
   http://www.gordano.com/

VisNetic Mail Server  
   Email server supporting POP3, SMTP and IMAP and mailing list services, account control and web mail. [Windows]
   http://www.visneticmailserver.com/

Internet Exchange Messaging Server  
   Standalone, open architecture server designed to co-exist with proprietary messaging systems. Support pages, forum, mailing list. [Linux, Win98/NT/2000]
   http://www.ima.com/iems/

SL Mail Pro  
   Web-based POP3 and SMTP email server software for Windows NT/2000 with 14-day free trial.
   http://www.seattlelab.com/products/slmailpro/

iWayMail  
   Developed for schools and school districts. Has centralized maintenance, building level administration, spam filtering, and web mail access.
   http://www.iwaymail.com/iwaymail_index.html

Atmail  
   A perl-based feature-rich web email system supporting access via web, WAP, POP3 or IMAP. Fully customizable, with web-admin, scheduler, migration scripts and Unix/Windows technical support.
   http://atmail.com/index.ehtml

Mailtraq  
   Comprehensive e-mail SMTP/POP3 and proxy server, with a mailing list server and intuitive WebMail service. Includes dialup manager, user accounting and content barring.
   http://www.mailtraq.com/612/

Mirapoint Email Server  
   Provides desktop email as well as web and wireless access. Has technology to block spam, viruses and hacker attacks, plus a portfolio of collaborative services such as group calendaring.
   http://www.mirapoint.com/products/message_server.shtml

NetCruiser Mail  
   Has POP3 and relay facilities. Includes shareware download, FAQ, support pages, and screenshots. [Windows]
   http://www.eternallines.com/netcruiser-software/prod-ma.html

Netscape Messaging Server  
   Shows its implementation, features, data sheet, FAQ, evaluation guide, and download.
   http://wp.netscape.com/messaging/v3.5/

NT Mail Server  
   Information and free trial with a list of features.
   http://www.ntmailserver.com/trial/

Openwave  
   Email server software for medium to large ISPs and telecommunication providers.
   http://www.openwave.com/us/products/

Eudora Freeware  
   Includes Eudora Email, Internet Mail Server (EIMS) v1.x and a POP3 server for Unix (Qpopper).
   http://eudora.qualcomm.com/free/

SocketMail  
   Mail server on Windows with SMTP, POP3 and web messaging. 30 days trial download available.
   http://www.socketmail.com/home/

1st Class Mail Server 4.x  
   Commercial mailserver with unlimited domains, mailboxes and mailing lists, graphical administration tool.
   http://www.1cis.com/download/1cismail.asp

WebEasyMail  
   Supportsa numerous standard protocols and services, has virus protection, and other securitz support. [NT/2000/XP]
   http://www.winwebmail.net/