Hello,
we are using Debian 8 with Postfix 2.11.3 installed from Debian Repo and
want to disable DSN reports only for success notifications because we
are receiving many backscatter like this in the past days:
"MESSAGE DELIVERED SUCCESSFULLY
Your E-mail requested a delivery notice/return receipt for the following
addresses:
<u...@example.org>:
<<< Message delivered."
In the manpages we have only found the possibility to disable DSN
entirely with smtpd_discard_ehlo_keywords = silent-discard, dsn
Thanks and Best Regards
Steven
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