
Many Windows mail servers do not have effective spam control built in. Several applications are available that are designed to be installed on the same machine an an existing mail server, while others provide an alternative mail server that has effective built-in spam countermeasures.
These Windows spam filters should work with any existing Windows mail server software you have. Some will work on the same machine as your existing software, providing a software proxy to filter the spam, while other software may need to be installed on a separate machine, which will pass email to your exisiting server on your network.
Praetor - www.cmsconnect.com/Praetor/prMain.htm - see: Praetor Managed eMail
BCware NoSpam - www.bcwaresystems.com/nospam/ - 2k+
Pinjo - www.pinjo.nl/
MAILsweeper SMTP - www.clearswift.com/products/mimesweeper-for-smtp - 2k+
SpamBolt - www.spambolt.com/
AlliGate - www.alligate.com/
Spam Sleuth Enterprise - www.bluesquirrel.com/products/SpamSleuthEnterprise/
MailMarshal - www.marshal8e6.com/solutions/email_security/mailmarshal-smtp.asp (Reviews: 1)
iQ.Suite for SMTP - www.group-technologies.com/de/produkte/intro.php?thisID=494 - 2k+
Visnetic MailScan - www.deerfield.com/products/mailscan/
Omniquad Mailwall - www.omniquad.com/omniquad_mailwall.htm
noSpamtoday - www.nospamtoday.com/ - SpamAssassin based
noSpamproxy - www.nospamproxy.de
Lightspeed Total Traffic Control - www.lightspeedsystems.com/filter/
SMTPTrap - www.smtptrap.com/
Philter - www.megaphat.com/products/philter/
Fluffy the SMTPGuardDog - smtpfilter.sourceforge.net/
Catch! - www.hartsoft.com/
IDRSMTPProxy - www.netikus.net/3rdParty/MemetAnwar/
Spam Manager Professional - www.eontech.com/spammgr/smpserver.html
MailMax - www.smartmax.com/MailMax5FeatureTour/spam.aspx
Leon - www.uniwares.com/products/leon.aspx
mxORB - www.mxorb.com/
GWGuardian - www.messagingarchitects.com/en/gwguardian/
MailSite collaborator anti-spam filter - www.mailsite.com/products/as/mailsite-anti-spam-filter.asp (Reviews: 1)
GFI MailEssentials - www.gfi.com/mes/ - 2k+
Green - www.targeted.org/green/ - 2k+
SMTP Trap - www.smtptrap.com/default.htm
Pinjo - www.pinjo.nl/
Catch! - www.hartsoft.com/modules.php?name=Content&pa=showpage&pid=3
eWall - sssolutions.net/ew/
WinSpamC - sourceforge.net/projects/winspamc/
LEON - www.uniwares.com/products/leon.aspx
Proventia - www-935.ibm.com/services/us/index.wss/offering/iss/a1027049
BitDefender Antispam for Mail Servers - www.bitdefender.com/PRODUCT-37-en--BitDefender-Antispam-for-Mail-Servers-(WIN-SMTP-Proxy).html
PureMessage for Windows - www.sophos.com/products/enterprise/email/security-and-control/microsoft-exchange/ (Reviews: 1)
SPAMfighter SMTP Anti Spam Server - www.spamfighter.com/Product_SMTP.asp
Sendmail Mailstream Manager - www.sendmail.com/sm/solutions/inbound/
Websense Email Security - www.websense.com/content/EmailSecurity.aspx
BitDefender Security for Mail Servers - www.bitdefender.com/PRODUCT-32-en--BitDefender-Security-for-Mail-Servers.html (Reviews: 1)
See also: Commercial Windows filters which use SpamAssassin - wiki.apache.org/spamassassin/CommercialWindows
These mail servers for Windows have built in spam control measures, and could act as a replacement mail server.
Mailtraq - www.mailtraq.com/
Mercury Mail - www.pmail.com/overviews/ovw_mercury.htm
Rockliffe MailSite - www.mailsite.com/products/mailsite-email-server-software.asp (Reviews: 1)
602Pro LAN SUITE - www.software602.com/products/groupware/
MailEnable - mailenable.com/
IceWarp Anti-Spam - www.icewarp.com/products/antispam/ (Reviews: 1)
ModusMAIL - www.vircom.com/en/products/modusmail/
XMail - www.xmailserver.org/
SmarterMail - www.smartertools.com/SmarterMail/Features/Windows-Mail-Server-Email-Antispam.aspx