Backscatter solutions

[Joseph Brennan]

Ian Eiloart <iane at sussex.ac.uk> wrote:

> If you aren't using SPF, then you can't really complain about backscatter.


Forget SPF.  Why should any system accept mail for an unknown recipient
and then mail a bounce?  That's the primary cause of backscatter.  These
systems are just as likely to accept the message, then check SPF, and
mail a bounce :-)


This is getting off topic for the Cyrus list though.  The question
relevant to Cyrus, I thought, was whether a sieve filter can catch
backscatter.  With header-only tests, not so much.


Joseph Brennan
Lead Email Systems Engineer
Columbia University Information Technology