MailEnable Professional Edition includes all of the features of the Standard Edition but also provides Webmail, Web Administration, support for third party Anti-Virus scanning, POP Retrieval, IMAP, SPF, Bayesian Filtering and HTTPMail.

MailEnable Standard Edition provides robust SMTP and POP3 services for Windows NT/2000/XP/2003 systems. This version is free for both personal and commercial usage and does not have any time, user or mailbox restrictions.

MailEnable Enterpise is a powerful mail server for Windows 2000/NT/XP. Supports SMTP, POP3 + unlimited email addresses, domains, groups + mailing lists

MailEnable Enterpise is a powerful mail server for Windows 2000/NT/XP. It supportsSMTP and POP3, supports an unlimited amount of email addresses, domains, groups and mailing lists.

Mail Server - SMTP/POP3/IMAP, AntiSpam (Bayes learning through IMAP/HTTP; SPF, SenderID, RBL, YDK), AntiVirus, content filter, aliases, routing, maill ists, mail robots, WebMail, statistics, unlimited domains and users number (auth AD, ODBC, txt)

Exclaimer Anti-Spam is one of the most accurate anti-spam systems available, with none of the limitations present in other anti-spam systems, requiring no training or maintenance, remaining highly effective over time, and virtually no false positives

VisNetic Mail Server is a multi-featured mail server that will scale to meet the email and instant messaging needs of any sized organization, including ISP and ASP environments.

MDaemon, Windows-based email server software, contains full mail server functionality and control with a strong emphasis on security to protect your email communication needs. Security features include Greylisting, DKIM, DomainKeys, SPF, Sender ID.