Solution: Bypass mailscanner for authenticated smtp users.

[Aaron Greengrass]

I spent a day or so thinking on this one, and have come up with a method 
that works for me.  I always appreciate seeing solutions to problems I'm 
having posted, so I am posting this one in turn.

One of the email requirements in my environment is that authenticated 
users not be subject to spam checks. (i.e. I know all of the users, so 
policy violation isn't an issue).

The postfix config i'm using puts everything into HOLD, which guarantees 
mailscanner will check it. My solution follows:

in /etc/postfix/main.cf
*header_checks = regexp:/etc/postfix/header_checks
smtpd_sasl_authenticated_header = yes
*
in /etc/postfix/header_checks
*/^Received: .*\(Authenticated sender:.*/ OK
/^Received:/ HOLD
*
There may be a more elegant way to do this, but this was the first 
method I came up with, and it passes all of my initial testing.

Regards,

Aaron.

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