On Mon, Jun 01, 2015 at 11:56:18PM +0000, Daniel Miller wrote:
> Is there a way of removing return-receipt requests from internal senders
> for a particular external recipient? ?Or does this require a separate
> tool/script to pass sent messages through?
This requires a content-filter. Return receipts (MDN not DSN) are
requested via the "Disposition-Notification-To" header. This would
have to be removed for particular senders only, and mere built-in
header checks don't easily do that.
However, you can use a policy service to arrange for an extra hop
through a Postfix smtpd/cleanup where the removal of the header is
unconditional.
main.cf:
smtpd_sender_restrictions =
check_policy_service inet:127.0.0.1:12345
nonmdn_header_checks =
pcre:${config_diretory}/nonmdn_header.pcre
master.cf:
127.0.0.1:2525 inet ... smtpd
-o cleanup_service_name=nonmdn-cleanup
-o smtpd_client_restrictions=
-o smtpd_helo_restrictions=
-o smtpd_sender_restrictions=
-o smtpd_relay_restrictions=permit_mynetworks,reject
-o smtpd_recipient_restrictions=permit_mynetworks,reject
-o smtpd_data_restrictions=
-o smtpd_end_of_data_restrictions=
nonmdn-cleanup unix ... cleanup
-o header_checks=$nonmdn_header_checks
nonmdn_header.pcre:
/^disposition-notification-to:/ IGNORE
The policy service has to return "FILTER smtp:[127.0.0.1]:2525" when
the sender recipient pair matches your needs.
--
Viktor.
