Netoscope 

Netoscope is a simple and effective tool to monitor Internet services such as web, ftp, or mail servers. When a monitored service fails, Netoscope can notify you about it or even correct the problem if possible.
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SpamMonitor 

SpamMonitor works in conjunction with file based mail servers, like Mdaemon, MailCoach, Winroute, etc. It will monitor for new files with a certain extension and passes all new messages to the spam filter, SpamAssassin.
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TZO Dynamic DNS Lite 

This is the classic version of the TZO Client software which first introduced the idea of linking a domain name to a Dynamic IP address. TZO uses true dynamic DNS client/server technology and has one of the most reliable infrastructures.
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Mail Direct 

Mail Direct is a program designed to send emails fastly, safely and directly to recipients, bypassing your ISP's mail server. It's not a mail client but it has a built-in SMTP server which can be quickly setup for use with your favorite mail client.
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Mady MTA Service 

Mady MTA Service is a small and easy SMTP server. It's small, stable and fast. It can use in a small LAN or home network and provide mail deliver service for a small group of users.
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Mail Storage Guard 

Mail Storage Guard is an extension for Microsoft Exchange Server 2000/2003 and IIS SMTP servers, designed to protect your server from spam, prevents mail relaying, mail-bomb and NDR attacks. Works at SMTP and at storage levels.
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