THIS IS A TEST INSTANCE. ALL YOUR CHANGES WILL BE LOST!!!!
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For fairness, we're trying to keep the items in each category in alphabetical order.
Windows
Wiki Markup AltN Technologies Mdaemon Mail Server - \[http://www.mdaemon.com AltN Technologies Mdaemon Mail Server\] \\
Wiki Markup Catch! for Windows - \[http://www.hartsoft.com Catch! for Windows\] - Cheap, with unlimited domains and users, SMTP proxy for any Windows mailserver. Implements [SpamAssassin], Virusscanning (f-prot) and several other heuristics to keep mailboxes clean. Settings can be configured at any level, global (all domains), individual domains and per user. Implements inheritence for settings. \\
Wiki Markup eMail2Pop for AOL® - \[http://www.email2pop.com eMail2Pop for AOL®\] - eMail2Pop interfaces with America Online to provide POP3 and SMTP access to AOL mail. Complete integration of [SpamAssassin] allows users to take advantage of spam filtering of AOL POP3 mail with little configuration required. \\
Wiki Markup Kerio Mailserver for Windows and Linux - \[http://www.kerio.com/kms_home.html Kerio Mailserver for Windows and Linux\] - 'SpamEliminator analyzes each email message against multiple criteria and gives it a numerical rating. If the message rating exceeds the threshold set by the user, the message is marked as spam and filtered according to the user's wishes. More information can be found at www.spamassassin.org. ' \\
Wiki Markup [McAfee]® [SpamKiller]® for Mail Servers - \[http://www.nai.com/us/products/mcafee/antispam/spk_mailserver.htm web site McAfee® SpamKiller® for Mail Servers\]. \\
Wiki Markup No Spam Today! SMTP Proxy - \[http://www.nospamtoday.com/server No Spam Today! SMTP Proxy\] - The easy-to-use setup of No Spam Today! requires just a few mouse-clicks to set up a complete [SpamAssassin]™ runtime installation on a Windows™ server (supports Windows™ NT/2000/XP/2003). Our SMTP proxy software makes it easy to integrate No Spam Today! for Servers into any existing SMTP infrastructure. \\
Wiki Markup \[http://www.nospamtoday.com/workstation No Spam Today! POP3 Proxy for Workstations - \[http://www.nospamtoday.com/workstation\] - With just a few mouse-clicks, No Spam Today! is configured to run on any Windows™ 98SE/ME/2000/NT/XP/2003 system. No Spam Today! easily connects to any POP3 email client. It additionally provides a wizard to enable spam protection for all your Outlook™ POP3 mail accounts. \\
Wiki Markup PYTHEAS _MailGate_: POP3 gateway for Microsoft Exchange and Lotus Domino - \[http://www.pytheas.com/pmgen.asp PYTHEAS MailGate\] - spam check with POP3 gateway for Microsoft Exchange and Lotus Domino. [SpamAssassin], anti-virus scanner interface, rules based content checking, optional outgoing mail handling. \\
- SAProxy - see the SaProxy page.
Wiki Markup [SpamMover] for Exchange 2000/2003 - \[http://www.ivasoft.biz/spammover.shtml SpamMover for Exchange 2000/2003\]: 'this application can create a folder named Spam in each Exchange 2000/2003 mailbox and move any ingoing message that is marked with specific mail header by anti-spam software like [SpamAssassin], to that folder.' \\
Wiki Markup \[http://www.spamnix.com/ Spamnix\] is 'the leading spam-blocking solution for Qualcomm Eudora on Windows and MacOS X' - \[http://www.spamnix.com/\] \\
Wiki Markup Visnetic Mail Server - \[http://www.deerfield.com Visnetic Mail Server\] \\
Linux
Wiki Markup Kerio Mailserver for Windows and Linux - \[http://www.kerio.com/kms_home.html Kerio Mailserver for Windows and Linux\] - (see above) \\
Wiki Markup \[http://opencompt.com Opencomputing Technologies [OpenProtect\] - virus/spam e-mail filter gateway for Linux/BSD - \[http://opencompt.com\] \\
Wiki Markup Roaring Penguin Software's [CanIt] - \[http://www.canit.ca/ Roaring Penguin Software's CanIt\] \\
MacOS X
Wiki Markup \[http://www.spamnix.com/ Spamnix\] is 'the leading spam-blocking solution for Qualcomm Eudora on Windows and MacOS X' - \[http://www.spamnix.com/\] \\
Network Appliances
Wiki Markup Barbedwire Technologies' Deep Packet Inspector - \[http://www.barbedwiretech.com Barbedwire Technologies' Deep Packet Inspector\]. This appears to be a Linux-based appliance which includes 'No Spam Today!' and '12 other security prevention tools'. \\
Wiki Markup Barracuda Spam Firewall - \[http://www.barracudanetworks.com Barracuda Spam Firewall\] \\
Wiki Markup Digitalinfo Networks [MailPoint] - \[http://www.digitalinfo.net Digitalinfo Networks MailPoint\] \\
Wiki Markup NAI [SpamKiller] for [WebShield] Appliances - \[http://www.nai.com/us/products/mcafee/antispam/spk_webshield_appliances.htm NAI SpamKiller for WebShield Appliances\] \\
Wiki Markup netZuno Technologies' [ZunoBox] - \[http://www.netzuno.com/ netZuno Technologies' ZunoBox\] - This easy to use fully-featured server solution includes mail server functionality with SPAM and Virus protection using [SpamAssassin], Amavisd-new and ClamAV. \\
Wiki Markup xDefenders mailDefender - \[http://www.xdefenders.com xDefenders mailDefender\] \\
Relay Services
Wiki Markup Messagewash - \[http://www.messagewash.com Messagewash\] (\[http://messagewash.com/index.php?option=com_weblinks&Itemid=4&catid=9 the 'links' page\] notes that they use SA.) \\
Wiki Markup Spam Interceptor - \[http://si20.com Spam Interceptor\]: (\[http://si20.com/faq the FAQ\] notes that they use SA): This is a web application which means you can use it on a Macintosh, Windows, Linux, or any operating system that has a web browser. \\
...
(We're not sure about these; it's been suggested that they use SpamAssassin, but their public websites do not give any indication either way.)
Wiki Markup [MessageLabs] relay service \[http://www.messagelabs.com/ MessageLabs\] relay service (JustinMason: do [MessageLabs] still use SA in their system? I don't think they do, any more.) \\
Wiki Markup [BlackSpider] relay service \[http://www.blackspider.com/ BlackSpider\] relay service (JustinMason: do [BlackSpider] use [SpamAssassin]? There's no indication on their website that they do.)