[unisog] Super-hidden spamming exploits?

Reg Quinton reggers at ist.uwaterloo.ca
Wed Oct 8 15:49:55 GMT 2003

> reject all mail without a resolvable sender.  By default, sendmail does a
> tempfail which allows the crud to collect in the queue.

A temp failure tells the other side to try again later. No crud collects in
your queue -- it collects in the senders queue (unless he's a spammer  who
would ignore any gripes anyways).

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