For whatever reason, I thought that when postfix rejects an email in the smtpd_recipient_restrictions it sends an email to sender notifying them = that their message got rejected for whatever reason.
Apparently this is not happening on my box, is this something that I can enable somewhere ? Is it recommended ? I would like to have this measure as it is a good failsafe measure for = False positives as people sending the email would know that their mail didn't = go through and find another to send it, instead of assuming that their = email go to its final destination.
