Spamassassin/Exim (incorrectly) blocking mail from localhost as spam

eximlocalhostspamspamassassin

On our server we've got a problem with spamassassin/exim4 blocking email from our mailing list software as spam. This because (usually) the headers the software (ecartis) adds add points to make it go over the boundary.

e.g.
Mail from a@.com -> server. 4.0 spam points
Mailing list software -> Exim 4, +2.5 spam point
Exim blocks email as having a score of 6.5

We've disabled the rules that usually trigger, but would like to whitelist all incoming mails. We've already tried a few things but it doesn't work. We do not want to raise the spam score limit because that lets real spam through. Is this possible and if yes, how?

Added to spamassassin local.cf:
trusted_networks 127/8

Exim rule that fires:

deny
  spam = Debian-exim:true
  message = This message scored $spam_score spam points.
  condition = ${if >{$spam_score_int}{59}{1}{0}}

Example of a rejected mail:

2011-12-20 12:04:21 1RcxUb-0002GM-EP H=localhost (xxx.xxx.xx) [127.0.0.1] U=ecartis F= rejected after DATA: This message scored 6.6 spam points.
....
P Received: from localhost
        ([127.0.0.1] helo=xxx.xxx.xx ident=ecartis)
        by xxx.xxx.xx with esmtp (Exim 4.72)
        (envelope-from )
        id 1RcxUb-0002GM-EP; Tue, 20 Dec 2011 12:04:21 +0100

Best Answer

The solution isn't to make spamassassin score these mails correctly, the solution is to not send them to spamassassin in the first place.

You need to add a rule beforehand to explicitly accept mails from your bulkmail host.

accept  hosts = 192.168.0.3

Change 192.168.0.3 to be server / network where you want to allow mails to come in from.

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