On 12/28/2016 1:03 PM, Martin Skjöldebrand wrote: > The output indicates it will discard the rubbish. I must've remembered > incorrectly or something. I'll spend some time later to look at the > logs. Thanks all who commented.
While it's very satisfying to DISCARD the rubbish, it's often counterproductive. It's almost always better to REJECT unwanted mail. When you DISCARD, that means your mail server has to process the entire message; REJECT will terminate the transaction before the body of the email is sent, saving bandwidth and CPU, and freeing an smptd process to accept more mail. When you DISCARD, the sender thinks you have accepted the mail; some bad actors take this as an invitation to send you ever increasing amounts of junk, wasting even more of your bandwidth and CPU. -- Noel Jones
