On 10/8/2009 10:17 AM, Duncan B. wrote:

Are you able to point towards some docs as to how I can achieve what I
need, to search for existence of a particular header


Thanks
Duncan

Requiring some specific coded header in postfix is not possible without some external content filter or milter. This relies on a legit bounce containing all original headers, which is often true but not guaranteed.

Some basic yet quite effective protection is detailed here:
http://www.postfix.org/BACKSCATTER_README.html
This relies on a bogus bounce message containing bogus headers, which is often true but not guaranteed.

Google for batv and/or batv-milter for a more intrusive but more reliable system.

  -- Noel Jones

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