Dewqs' SpamProx   
http://www.dewqs.com

Spam Proxy : seamless interface between your email client and your mail server [Outlook Express version]. Technology using Dewqs' Tribes now famous anti spam engine. Black listing, white listing. Multithreaded server. SpamProx is an invisible link between Outlook Express and your POP3 email server. Spam messages are processed, not deleted. Filters the results in your favorite email client.

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.

GetMail   
http://www.e-eeasy.com

Can't read your Hotmail in your favourite mail client? Can't read your Hotmail on your mobile phone? Used to have a Hotmail account but now have a new account(s)? Have a GMail account and want to gather your old e-mail accounts together? Got a Blackberry device? Want to moitor your childrens e-mail? The uses for GetMail are virtually endless. GetMail will forward e-mail from a Hotmail/MSN or POP3 account(s) to any number of destination accounts and has some very clever advanced features! Mark mail as read or delete it, forward from any Hotmail/MSN folders (inbox,bulk,your own folders), mark which source folder a mail came from, filter for spam, filter for zip/exe attachments, intelligent forwarding (leave e-mail on the server and it will not be forwarded more than once, unless you choose to!), migration tool to make moving from one account to another very easy (even by-passing Hotmails sending limit) PLUS MANY MANY MORE FEATURES!

eMail2Pop   
http://www.porkchup.com

eMail2Pop functions as a POP3 and SMTP mail interface and spam filtering solution for AOL® Mail and Google Gmail(tm) accounts. eMail2Pop converts AOL mail and Gmail into a standard mail format. This means that AOL and Gmail users can retrieve their email from their favorite email client (such as Microsoft Outlook, Eudora, Incredimail, Act, The Bat, etc). eMail2Pop also includes a powerful integrated spam filter. For AOL accounts, eMail2Pop is independent of the AOL software program and does not require AOL to be installed for most users. The eMail2Pop Wizard will walk first-time users through setting up their email program to manage AOL Mail and Gmail. The integrated spam filter is very customizable, using features such as whitelists and blacklists, online blacklist checking, and self-teaching Bayesian analysis. eMail2Pop is a third-party product, and is not endorsed, sponsered, or affiliated with America Online, Inc or Google, Inc.

SMTPTo   
http://www.ionly.com

Tired of writing and writing similar emails? You don't have to. Let SMTPTo do the stupid work for you. Your time is to valuable, go for the tasks where you're brain is needed or just enjoy your more relaxed life. It does not matter which type of emails you have to write: follow-ups for info requests, prize inquiries, download requests, answers to frequently asked questions, typical additional information requests, just to name a few. You create your standardized answers and from now on, answering boring emails is a pleasure. Even better, your recipients will love how detailed and but incredible fast you are able to answer. Key benefits: - React faster and better by email - Use templates to send standardized emails - Personalize common emails - Stop writing similar messages - Email from any app w/ command line support - Works great with script languages and batch files Unique Features: Attachments: With every email you can send multiple attached files. The path information of the files can be given relative and absolute, including UNC. Command Line: SMTPTo works directly from the windows command line and with every application that supports command line. Easy-to-use: Only the absolute necessary parameters have to be passed, like sender, recipients, subject and message. All other parameters are optional and only need to be passed when you need to change the defaults. HMTL and Text Message: No need to choose. If you send a html message SMTPTo automatically creates the corresponding text message, that your recipients can definately read it. Related Files: The ideal option for full-featured html messages. Send all additional files related, that the recipients don't need to go online to view the message correct. Easily include script files, css or images. No Mail Server Required: The build-in SMTP server connects your recipients' mail server directly. More: Quiet Mode, supports Unicode (UTF-7/UTF-8), Firewall/Proxy (socks4/5), message from file