hMailServer

hMailServer
Developer(s)	Martin Knafve
Initial release	2002
Stable release	5.3.3 (Build 1879) / June 7, 2010
Preview release	5.4 beta (Build 1931) / August 21, 2011
Repository	github.com/hmailserver/hmailserver ;
Written in	C++, C#
Operating system	Microsoft Windows 2000/XP/2003/Vista/2008 (v4.0/v5.0)
Platform	Windows
Type	Mail transfer agent
License	up to v4: Open source, v5: Closed source (Now open source)
Website	http://www.hmailserver.com

hMailServer is a free email server for Windows created by Martin Knafve. It runs as a Windows service and includes administration tools for management and backup. It has support for IMAP, POP3, and SMTP email protocols. It uses database engines (MySQL, MS SQL or PostgreSQL) to store configuration and index data but the actual email messages are stored on disk in a raw MIME format. It has active support and development forums.

Common features such as multiple-domain support, aliases, catch-all and basic mailing lists are present. Users can be authenticated both against the local hMailServer user system and against an external Active Directory. Using a voting system on the hMailServer web site, the hMailServer users decide which features should be implemented in the software.

AntiSpam

hMailServer offers a number of different AntiSpam mechanisms:

Host based DNS Blacklisting (DNSBL)
URL based DNS blacklisting (SURBL)
Greylisting (must retry sending for the message to succeed)
SPF
Built in SpamAssassin integration
DKIM (in version 5.1)

AntiVirus

hMailServer has built in support for ClamWin/ClamAV. It's possible to execute any command line virus scanner.

Other features

Domain and account signatures (for legal and advertising footers)
Server side rules (rules for individual accounts available in v5)
Retrieval of messages from external POP3 accounts
Quotas on domain, mailbox, and individual message sizes
Plus addressing (using + to make a virtual alias for an account specific to a task, as seen in Gmail)
Attachment blocking (based on attachment extension)
Custom SMTP routes for specific domains (can be used to set up MX backup, forwarding and more)
API (it's possible to write hMailServer scripts using VBScript and JScript)
Built-in support for SSL

Integration

ClamAV anti-virus software
SquirrelMail for webmail, (requires IIS or Apache); spell-checking available
Roundcube for webmail, also requires auxiliary database provider such as mySQL to operate
SpamAssassin spam filtering

History

The hMailServer project was started in 2003. Up until 2008 and version 4, the project was open source software. Version 5 and later is closed source.

External links