Justification:
For more than a year now I have been giving everybody a different email address and using maildrop to filter all the addresses that start receiving spam into another folder. Now I get so much spam I don't carefully read the subjects in that folder, so I thought it was wise to send DSNs to those sending messages to a blocked address telling them
99 times out of 100 the return address if forged, so you'll be crapping your bounce into an innocent forgery's victim mailbox (in addition to many other people who are doing the same).
/usr/local/bin/sendmail -f '')? when I do this, courier rejects my message, saying "550 relaying mail to <domain I'm sending to> is not allowed".
There no such error message in Courier.
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