ArGoSoft Mail Server Pro with IMAP 1.8.9.6

ArGoSoft Mail Server is full SMTP/POP3/Finger/IMAP server for all Windows platforms, which will let you turn your computer into the email system. Even though, it is loaded with features, It is very compact, takes about 1-5 Mb of disk space (depending on the version), does not have any specific memory requirements, and what is the most important - it's very easy to use.

Pro version of mail server:
Supports IMAP (version with IMAP module, which has to be purchased separately);
Has "true" support of multiple domains - you can create accounts with the same name, which belong to different domains;
Supports multiple IP homes (virtual domains);
Has built in mailing list server;
Has WAP interface;
Allows setup of domain administrators - users who can change domain related information via the Web interface;
Filtering of mail according to IP addresses of server which attempts to relay mail to local users;
Supports advanced anti-spam features:
Trusted and banned IP addresses
DNSBL - checking of IP addresses, listed in popular DNS based databases, such spamcop, ORDB, and so on;
Sender Policy Framework (SPF);
Graylisting;
Whitelisting;
Sender address verification - validation with sender servers;
Supports server extensions - plugins, created by users, which do custom mail processing;
Web interface supports multiple folders.