Re: Pcre header checks

[Noel Jones]

On 3/6/2011 5:39 PM, Erik de Castro Lopo wrote:
Hi all,
I'm running postfix version 2.8.1 from Debian.

I've got basic pcre header checks working as they should. I'm trying
to reject mail that has a DKIM signature that says its from att.net
but a Message-ID ending in 'yahoo.com'.

I've got this:

     if /^DKIM-Signature: .*; d\=att.net;/i
     /^Message-ID: .*\.yahoo\.com>/i                  REJECT
     endif

but it doesn't seem to work. Clues?


Postfix evaluates headers one at a time, and doesn't save 
state from one header to the next.  Consequently, you can't 
compare two headers.

To compare reject mail based on two headers, you'll need to 
use a milter or smtpd_proxy_filter.


  -- Noel Jones