Stefan Unterweger <28443.kr@8j1.enskribi.email> (Di 18 Apr 2017 20:07:33 CEST): > I want to scrub certain kinds of headers for all incoming messages so … > I have tried to find some kind of string expansion which would give me a > list of all message headers which start with my chosen prefix, or some > other kind of trick to get similar results, but so far, I didn’t find > anything. Of course I could list all possible combinations of ‘Spam-…’ > that I can think of, but this is kind of a losing battle…
As part of my data acl I use:
warn set acl_m_headers_remove \
= ${filter {MESSAGE_HEADERS}{match{$item}{\N^x-(?:ius|hh)-\N}}}
to remember all headers matching /^x-(ius|hh)-/i in an ACL variable.
The MESSAGE_HEADERS macro is:
MESSAGE_HEADERS = \
${lc:${sg\
{${map\
{ <\n ${sg {$message_headers_raw}{\N\n\s+\N}{ }} }\
{${extract{1}{:}{$item}}}\
}\
}\
{\N\n\N}\
{:}\
}}
The actual removal is done in the transport as follows:
begin transports
smtp:
driver = …
headers_remove = $acl_m_headers_remove
headers_add = $acl_m_headers_add
But, please note, this solution has not been reviewed for a long time, but
it is in use currently and seems to work.
Best regards from Dresden/Germany
Viele Grüße aus Dresden
Heiko Schlittermann
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