SMTP Preprocessor 

Enhances functionality of corporate mail server. Receives SMTP messages before it, on-the-fly changes or rejects them, and retransmits result to the server. Supports wide range of settings and keeps adjustable log.
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CommView for WiFi 

CommView for WiFi is an l edition of CommView designed for capturing and analyzing network packets on wireless 802.11a/b/g networks. With CommView you can see the list of network connections and vital IP statistics and examine individual packets.
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Servers Alive 

Servers Alive v5, a full-featured Windows network monitoring program that can monitor any Winsock service, monitor MMS streams, ping a host, check if an NT service or process is running, and more!
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GFI MailEssentials for Exchange/SMTP 

Spam protection and email management at server level. GFI MailEssentials offers a fast set-up and a high spam detection rate using Bayesian analysis and other methods - no configuration required. Also adds key email tools to your mail server.
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Iban 

- Want to know who is or owns an ip address or domain? - Search worldwide for interesting domains. - Hear when a line breaks down/is up. - Know why you can not reach a domain. - Solve internet problems from your desk. - New: Reports printable
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Eserv Mail, News, Web, FTP and Proxy Servers 

Eserv/2.99 - Mail, News, Web and Proxy Servers - Mail Server (SMTP, IMAP4 and POP3) - News Server (NNTP) - Web Server (HTTP) - FTP Server - Proxy Servers (HTTP, FTP, Socks, etc) - Finger Server - Built-in scheduler and dialer
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