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Mail Server Architecture
- To: misc_(_at_)_openbsd_(_dot_)_org
- Subject: Mail Server Architecture
- From: "L. V. Lammert" <lvl_(_at_)_omnitec_(_dot_)_net>
- Date: Tue, 10 May 2005 14:56:52 -0500
We're planning on upgrading some mail servers with 3.7, .. but we're having
an internal 'debate' over the architecture.
Keeping things simple (sendmail - don't need antoher MTA debate!), the
question is three-fold:
1) Vilter/Milter - using sendmail to scan incoming messages in realtime.
Pro: Reject messages before being accepted.
Con: Possibility of locking up sendmail daemon; performance hit for
2) Mainscanner - passing emails to external programs for scanning virus/spam.
Pro: Can be restarted automatically if a scan crashes.
Con: Messages are accepted even if invalid.
3) Amavisd - alternative to Mainscanner, same architecture
4) Cyrus - doesn't seem to be a package nor complete port in the tree?
There are a variety of notes available, but not a lot of good information
about *why*. Prefer to stay with sendmail as it's in the base install, and
we have used SM/MS/ClamAV/SA in the past with some success so there's a
little intertia towards that solution.
Any pointers to good resources for details would be greatly appreciated.
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