postfix, spamassassin and amavisd ;-)
SA comes with several ip reputation tests, plugins and scores.
Barracuda has one, with special spamassassin support (will be in SA 3.3,
for 3.2x you have to manually add it)
If you are looking for more than what SA already has, look into the
commercial DCC reputation upgrades.
--
Michael Scheidell, CTO
Phone: 561-999-5000, x 1259
> *| *SECNAP Network Security Corporation
* Certified SNORT Integrator
* King of Spam Filters, SC Magazine 2008
* Information Security Award 2008, Info Security Products Guide
* CRN Magazine Top 40 Emerging Security Vendors
* Finalist 2009 Network Products Guide Hot Companies
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