LiteMail   
http://www.cmfperception.com

LiteMail is an easy to use mail server that includes unlimited addresses, unlimited domains, forwarding, relaying, SMTP Authentication, a catch-all address and quotas. Integrated DynDNS and No-Ip dynamic DNS clients help make LiteMail a complete and convenient server solution. The administrator is given a precise log of everything that occurs and has the ability to monitor and kill connections.

Cactus Spam Filter   
http://www.codeode.com

Cactus Spam Filter is a free easy-to-use spam blocker. It protects your inbox by learning to detect spam as it's being used. After a short while it has adapted to your personal mailbox and blocks out most of the junk e-mail. Since the filter becomes personal, spammers will not be able to fool it. Installation is very simple. No setup is required in your e-mail client; this spam stopper integrates seamlessly with all e-mail clients that use POP3. It has been successfully tested with Microsoft Outlook, Microsoft Outlook Express, Netscape, Opera, Mozilla, Mozilla Thunderbird, Eudora, Pegasus Mail, IncrediMail, Foxmail, POP Peeper, Command Line POP Client and Phoenix Mail. This anti-spam program learns to detect spam as it's being used, and believe me, Cactus Spam Filter is a fast learner. After a few e-mails it will start to make its own decisions to relieve you from the spam burden. Even though this is a brutal, merciless spam killer, no e-mails will get lost unless you delete them. One of the unique features of Cactus Spam Filter is the ease of use. After you have downloaded and installed it no more settings are required! No account setup, no POP proxies, nothing! Just start your favorite e-mail program and Cactus Spam Filter will instantly protect it!

MailMonitor   
http://www.digiarch.org

MailMonitor is a program enabling you to monitor incoming and outgoing mail traffic to and from you mail server and clients. It tracks, displays and logs incoming and outgoing SMTP sessions, POP sessions and sent and received e-mails. It can store incoming and outgoing e-mail in a separate directory independent of mail clients. Finally, it keeps a trace of all e-mail related session traffic (at packet level). This enables you to explore in depth what is going on in your e-mail environment. These features make MailMonitor a valuable tool for tracking your e-mail flow in your e-mail environment in case of problems with sending or receiving e-mail. Watch for unsolicited mail forwarding, SMTP hacking (spammers that use your server to send their messages) and a host of other e-mail server related problems. Features: View SMTP and POP3 sessions with complete session trace. Track all e-mails passing your server. Monitor SMTP authentication with IP, username and password. Monitor POP authentication. Scan for mail errors and abnormalities. Store every e-mail passing your server. See a complete packet level trace of e-mail traffic only. Supports VPN tunnels. Bottom line: If you have mail server problems, MailMonitor shows you what's going on at port and packet level.

123 Bulk Email Sender 2006   
http://www.123HiddenSender.com

123 Bulk Email Sender is a professional high speed bulk email sender program. It is an ideal for newsletters, targeted marketing, and keeping in touch with clients. Because this mailer sends out mails in MX mode and works like a mail server, you don't need unreliable blind relays anymore. As a multi-threaded application, 123 Bulk Email Sender 's normal sending speed can up to 50000 e-mails per hour. It also has a professional and simple user interface so that everyone can set it up in few minutes.

123 Bulk Email Sender 2005   
http://www.123HiddenSender.com

123 Bulk Email Sender is a professional high speed bulk email direct sender program. It is an ideal for newsletters, targeted marketing, and keeping in touch with clients. Because this mailer sends out mails in MX mode and works like a mail server, you don't need unreliable blind relays anymore. As a multi-threaded application, 123 Bulk Email Sender 's normal sending speed can up to 50000 e-mails per hour. It also has a professional and simple user interface so that everyone can set it up in few minutes.