On Thu, Oct 08, 2009 at 03:17:27PM +0000, 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
Which part of "No built-in Postfix feature checks for the absence of a
header, let alone conditions such a check on the envelope sender address"
was unclear when I answered your question?
You need a (pre or post-queue) content filter or milter or tell customer
you can not provide the requested feature.
--
Viktor.
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