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RE: Is anyone else getting DoS'd by relay attacks?

2005-01-14 13:58:15
Hannah Schroeter [hannah(_at_)schlund(_dot_)de] wrote:
And yet another point where forwarding would break.

Say I have this aliases file on foo.domain

      a: b(_at_)bar(_dot_)domain, c(_at_)bar(_dot_)domain

Now, I receive a bounce to a(_at_)foo(_dot_)domain, then I'd usually bundle
the forward into one SMTP transaction, and voilà, you have a MAIL FROM:
<>, with 2 RCPTs.

Receiving a bounce to a distribution alias address would require that the
alias address was used as a MAIL FROM before, which would be very unusual.
(Not saying that it couldn't happen.)