Mailtraq is a commercial mail

Mail transfer agent

Within Internet message handling services , a message transfer agent or mail transfer agent or mail relay is software that transfers electronic mail messages from one computer to another using a client–server application architecture...

 and groupware

Collaborative software

Collaborative software is computer software designed to help people involved in a common task achieve goals...

 server. It runs on Microsoft Windows

Microsoft Windows

Microsoft Windows is a series of operating systems produced by Microsoft.Microsoft introduced an operating environment named Windows on November 20, 1985 as an add-on to MS-DOS in response to the growing interest in graphical user interfaces . Microsoft Windows came to dominate the world's personal...

.

Features

The email server offers POP3, SMTP, HTTP, IMAP4 all with SSL/TLS support, plus NNTP, and provides webmail functionality.
It includes Bayesian anti-spam classification

Bayesian spam filtering

Bayesian spam filtering is a statistical technique of e-mail filtering. It makes use of a naive Bayes classifier to identify spam e-mail.Bayesian classifiers work by correlating the use of tokens , with spam and non spam e-mails and then using Bayesian inference to calculate a probability that an...

, and interfaces natively with Spamassassin

SpamAssassin

SpamAssassin is a computer program released under the Apache License 2.0 used for e-mail spam filtering based on content-matching rules. It is now part of the Apache Foundation....

. It also provides a SyncML

SyncML

SyncML is the former name for a platform-independent information synchronization standard. The project is currently referred to as Open Mobile Alliance Data Synchronization and Device Management...

 service to allow direct synchronization for contacts and calendars with the BlackBerry

BlackBerry

BlackBerry is a line of mobile email and smartphone devices developed and designed by Canadian company Research In Motion since 1999.BlackBerry devices are smartphones, designed to function as personal digital assistants, portable media players, internet browsers, gaming devices, and much more...

, iPhone

IPhone

The iPhone is a line of Internet and multimedia-enabled smartphones marketed by Apple Inc. The first iPhone was unveiled by Steve Jobs, then CEO of Apple, on January 9, 2007, and released on June 29, 2007...

 and similar devices.

Versions

The first release of the product (then named "Fastraq Mail Server") was in 1996.

The current version is 2.16

Editions

There are two editions:

• Professional - contains all features

• Essential - contains basic SMTP, POP3 and mailbox functions

A Proxy function is available as an add-on for either edition.

There is also a free version called "Mailtraq4Home" that is limited to 4 users.

Databases

The software stores messages in a database. The current version provides three database options:

• AFV/IDX is the original storage method, with each mailbox having a dedicated pair of files
• Firebird
  Firebird (database server)
  Firebird is an open source SQL relational database management system that runs on Linux, Windows, and a variety of Unix. The database forked from Borland's open source edition of InterBase in 2000, but since Firebird 1.5 the code has been largely rewritten ....
  
  is a SQL database, storing all mailboxes in the same file
• AFX is the latest database option, with each mailbox being stored in a separate file (but without the need for a sidecar IDX file)