On Mon, 2006-05-08 at 16:49 +0200, Paolo Cravero as2594 wrote:
> I'm looking into writing a SA plugin that checks message recipients 
> against an LDAP server and assigns extra score for non-existing address.

Why?  You should reject mail to unknow recipients at smtp level.  This
is surely much less expensive because at this time you have only
received the a few lines of communication, and nothing of the body.

> (We cannot implement this check at Postfix-MTA level because our users 
> are listed on two separate servers and some are 100% outsourced)
Well, how will you get a list of valid recipients in any way?  If you
have access to the list via spamassassin/amavisd-new, why would postfix
not have access?  What do the servers run?  Even from exchange, it's a
trivial excercise to generate a relay_recipient list for postfix.

Hans



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