On Tue, Oct 19, 2021 at 06:55:15PM -0400, [email protected] wrote:
> Is there a setting for disabling delivery status notification reports
> being emailed back to the sender address by MAILER-DAEMON? I could not
> find one searching in postconf.5.html
I generally disable the 'DSN' EHLO keyword on the inbound SMTP port.
$ postconf -P smtp/inet/smtpd_discard_ehlo_keywords
smtp/inet/smtpd_discard_ehlo_keywords = silent-discard,DSN,ETRN
> Is there any negative effects from disabling this?
> I feel like it could be abused as a type of back scatter.
Generally, no.
--
Viktor.
