Domain used for spam - NDR responses

Jeff Mills Jeff.Mills at
Wed Oct 3 06:36:07 IST 2007


> -----Original Message-----
> From: mailscanner-bounces at 
> [mailto:mailscanner-bounces at] On Behalf 
> Of Rob Sterenborg
> Sent: Wednesday, 3 October 2007 3:27 PM
> To: MailScanner discussion
> Subject: RE: Domain used for spam - NDR responses

> What MTA?
> I know that Postfix can do recipient address verification 
> (just like sender address verification that some despise), if 
> the final receiving MTA rejects non-existing recipients. 
> Perhaps you can use this, in which case you don't need relay 
> recipient maps.
> Of course you'll have the penalty of some extra network 
> traffic between the relay and the final MTA's.
> Grts,
> Rob

MTA is Postfix.
Interesting.. So if I understand correctly, postfix will query the
backend server to see if a user exists before it accepts the inbound
I will look into that now.

Thanks Rob.

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