email - SpamAssassin filter header -

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i'm trying filter messages header return-path contains string '@example.eu'.

i added /etc/mail/spamassasin/local.cf lines:

my first attempt: 

header local_demonstration_all  return-path =~ /example\.eu/i score local_demonstration_all   10.0

my second attempt: 

header local_demonstration_all =~ /return-path.*example.eu>/i score local_demonstration_all   10.0

another filters work, above doesn't. checked regex ok.

what's wrong? thanks.

the return-path header contains envelope sender , typically added email when delivered recipient's mailbox, i.e. not present visible header while email in transit.

the envelope sender passed in smtp dialog using mail from command , can used in spamassassin rules, depending on how spamassassin being called actual details may vary.

spamassassin has pseudo-header envelopefrom tries populate envelope sender using heuristics (or can tell spamassassin how should populated using envelope_sender_header configuration option). setups rule should work:

header local_demonstration_all  envelopefrom =~ /example\.eu/i score local_demonstration_all   10.0

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