[nSLUG] Whither to bounce unknown recipient address?

D G Teed donald.teed at gmail.com
Thu Aug 30 13:16:15 ADT 2007


I read the postfix backscatter readme today.

http://www.postfix.org/BACKSCATTER_README.html

Up until now it seemed like a good idea to always bounce
undeliverable email, so people can realize their typos.
But this seems to be a spammer technique to deliver
via forged from addresses.

I'll have to convince people setting

   unknown_local_recipient_reject_code = 550

in postfix is a good idea.

How many of you use this (or similar) in your MX server?

--Donald



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