On Tue, 21 May 2019 18:24:46 +0000 MRob via dovecot <dovecot@dovecot.org> wrote:
Many people prefer to use LMTP for delivery from postfix for better efficiency but X-Original-to header support still missing after many years. One affect of this is need to set sieve_vacation_dont_check_recipient = yes which violate Sieve standard and cause auto-replyies sent to messages that should not happen. Or abandon LMTP. or abandon postfix??
So while feature request is stalled are there any realistic workarounds?
add to smtp_recipient_restrictions, before permitting email but after all checks:
check_recipient_access pcre:/etc/postfix/recipient_access.pcre# cat /etc/postfix/recipient_access.pcre /(.+)/ prepend X-Original-To: $1
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