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[Bill Hacker]

Matthew Dillon wrote:
    Bleh.  This is annoying.  The spams are using a From: field for a
    subscribed user.
    Anyone know an easy way to disallow use of crater's domain name
    in the From: field for SMTP connections from remote locations?
    using sendmail?
					-Matt
					Matthew Dillon 
					<dillon at backplane.com>
Using Exim it is dead-easy. Sendmail is capable enough - but sort of 
like working in machine-code. For a Varian 520i... haven't done either 
one is *years*...

;-)

But the forgery won't matter if you reject on rDNS fail of an incoming IP.

'Real' MTA have proper PTR RR. Always.

Zombies, never.

Bill