Linux – SA with or without amavis-new – whats faster

amavislinuxpostfixspamassassin

Currently i have working setup of postfix with virtual users which uses amavis (with SA and clamav) to filter messages.

The problem is, i need to allow every user to be able to adjust their SA settings. So i need to store SA settings in a database. Its quite simple to do when SA runs without amavis, but is it ever possible to force SA and amavis to use database?

If not, what will be performace influence when i drop amavis and use SA directly with postfix?

Best Answer

is it ever possible to force SA and amavis to use database?

It should be since the 2.7.0 version of Amavisd-new which introduces the @sa_userconf_maps configuration parameter. From the Amavisd-new release notes:

SpamAssassin will be requested to load a user preferences configuration through its read_scoreonly_config() or load_scoreonly_sql() method, which otherwise (in spamd) serves to load user's .spamassassin/user_prefs file or SQL preferences when switching users. See SpamAssassin documentation file sql/README for SQL details.

[...]

Example:

@sa_userconf_maps = (
  { 'user1@example.com' =>
      '/etc/mail/spamassassin/special_user_config',
    '.example.org' => 'sql:',
  }
);

If not, what will be performace influence when i drop amavis and use SA directly with postfix?

Spamassassin/spamd would be able to filter mail, but Amavisd-new does a lot more than that. Your impact would not be not so much performance-wise (since Amavisd-new does just invoke the appropriate SpamAssassin functions, similar to what spamd is doing too) but you would lose Amavisd-new specific functionality like the lovers maps, the destiny configurations, the antivirus scanner integration, the attachment file type recognition, ...

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