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From: Aniruddha on 21 Jul 2010 02:47
When somebody emails to a non-existing e-mail address postfix bounces these
by default with a "Recipient address rejected: User unknown in local
recipient" error. I wonder what the appropriate behavior is. To discard
emails for unknow, users, forward them to another address
or bounce them? What about backscatter? Doesn't bouncing generate a lot of
backscatter? Thanks in advance!
From: Aniruddha on 21 Jul 2010 03:35
Thanks for the help all! Now I see that because the e-mail is rejected
during the connection phase the mails never were send in the first place.
And because of this the mail delivery failure is only received by the one
who originally send it, even if he spoofed a domain. I thought these
'mail delivery failure' reports were also a possible source of backscatter.
Thanks again!
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