Seth Dillingham <seth.dilling...@gmail.com> (Di 02 Nov 2010 02:02:47 CET):
> I have the following in my acl_check_data:
>
> warn spam = nobody
> condition = ${if < {$message_size}{10K}}
> add_header = X-Spam_score: $spam_score\n\
> X-Spam_score_int: $spam_score_int\n\
> X-Spam_bar: $spam_bar\n\
> X-Spam_report: $spam_report
>
> # reject spam with high scores
> deny message = This message scored $spam_score points.
> spam = nobody:true
> condition = ${if < {$message_size}{10K}}
> condition = ${if > {$spam_score_int}{70}{1}{0}}
>
First - shouldn't be the test for the message size done befor the spam
condition? If I understand well, the conditions are evaluated in order,
thus it is scanned always, but the result is used only for messages
<10k. (BTW, 10k seems to be quite small, the headers count here too.,
may be you should use the $message_body_size, if it is available in the
data acl.)
> This is working well enough, but I'd like to skip these tests under
> certain conditions:
>
> * if the sender is on the localhost
> * if the message wasn't originally sent with SMTP
> (I have scripts on the server which send mail to me
> by calling Exim directly)
> * if the sender is authenticated
>
For non-SMTP the data acl is not used.
The following outline is roughly based on the rules we use.
It is something that *could* work, but it is not tested.
I like to set the reject threshold in Exim, not in SA.
accept senders = localhost
accept authenticated = *
accept condition = ${if >={$message_size}{10k}}
add_header = X-Spam-Comment: not scanned
deny spam = nobody:true
condition = ${if >{$spam_score_int}{120}}
accept add_header = X-Spam-…\n\
…
It get's a little bit more complicated if you want to scan for viruses
too, but want the virus scan without exceptions. Then some "sub-acl"
might help you to keep the structure clean.
is_trusted:
accept senders = localhost
accept senders = +relay_from_hosts
accept authenticated = *
deny
acl_check_data:
…
accept acl = is_trusted
…
Best regards from Dresden/Germany
Viele Grüße aus Dresden
Heiko Schlittermann
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