[Mailman-Users] specific (1) LHS and (2) sender rules to frustrate spam/phishing
Stephen J. Turnbull
stephen at xemacs.org
Sat Jun 30 15:36:19 CEST 2007
Rich Kulawiec writes:
> Any incoming mail message whose putative sender matches:
> and which is directed to any of the Mailman standard aliases can
> be rejected (not bounced ) with SMTP status 550 (extended status
> 5.7.1) since either:
> (a) it's a forgery, therefore there's no point in letting
> Mailman attempt to emit a reply -- or even in accepting
> the message to begin with.
> (a) it's not a forgery, therefore there's no point in trying
> to reply to it.
You have to be careful, though. For several years on one of my lists
I had a subscriber whose address was something like (I don't recall
exactly) "nobody at not-a-real-address.somewhere.net", which was a
perfectly valid address and at which he/she/it did receive mail and
from which he/she/it would reply.
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