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Postfix greylisting policy service with auto-white-listing written in Perl with SQL database as storage backend. Greylisting stops 50 to 90 % junk mails (spam and virus) before they reach your Postfix server (saves BW, user time and CPU time).
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Email Spam FilterLicense
GNU General Public License version 2.0 (GPLv2)Follow SQLgrey Postfix greylisting service
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User Reviews
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Been running this in ~10 years in production to date. No issues, just works. (oh, and im a developer on this project and thus a little biased :))
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Seems to be a problem if you try to enable the clustering option. :( Does anyone know how to fix this problem?? Nov 6 20:11:25 mta-0 sqlgrey: dbaccess: Using DBIx:DBCluster Nov 6 20:11:25 mta-0 sqlgrey: fatal: Can't locate object method "connect" via package "DBIx::DBCluster" at /usr/sbin/sqlgrey line 843.
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Sqlgrey is perfect! Thanks.
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Does what it says on the tin. Generally requires very little in terms of management or server resources.
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I'm the main developer, of course I like it :-) Seriously, it gets the job done without getting in the way.