Querying other SMTP server for valid addresses?

Steve Swaney Steve.Swaney at FSL.COM
Sat Nov 20 21:23:13 GMT 2004

> -----Original Message-----
> From: MailScanner mailing list [mailto:MAILSCANNER at JISCMAIL.AC.UK] On
> Behalf Of Drew Marshall
> Sent: Saturday, November 20, 2004 3:38 PM
> Subject: Re: Querying other SMTP server for valid addresses?
> Steve Swaney wrote:
> >Now can Postfix do this trick?
> >
> >
> Put simply, yes! Postfix uses an extension of it's address verification
> system. Full details are here
> http://www.postfix.org/ADDRESS_VERIFICATION_README.html all you need to
> do if you don't want to do address verification on all incoming
> connections (See the warning at the top of that document) is just
> specify the domains you control. Postfix also has the luxury of using a
> cache  after (un)successful verification, which will speed up future
> look ups still further. Obviously the same caveats apply to Postfix's
> version as Exim's and milter-ahead. It won't work on >Exchange 2003 or
> Notes.
> Drew
Thanks Drew,

We now have method for verifying valid recipients on back end mailhubs for
sendmail Ensim and Postfix. I'll work with Ugo and see if we can't get this
information written up and the MAQ updated.


Steve Swaney
Fortress Systems Ltd.
steve.swaney at fsl.com

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