Ian Eiloart <iane@xxxxxxxxxxxx> 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 ---- Cyrus Home Page: http://cyrusimap.web.cmu.edu/ Cyrus Wiki/FAQ: http://cyrusimap.web.cmu.edu/twiki List Archives/Info: http://asg.web.cmu.edu/cyrus/mailing-list.html
