Postfix: How to prepend a header only once?
I want to prepend a header with postfix to every outgoing mail from a
specific domain. At the moment i use:
check_sender_access hash:/etc/postfix/prepend
with /etc/postfix/prepend:
my.domain PREPEND Header: value
this works quite nice, but when i send a e-mail to several recipients,
then the header is added multiple times, one for each recipient, to each
of the outgoing mails.
so when i send a mail to 4 persons, each of them receives a mail, which
contains the header 4 times.
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