Windows Exchange Server

[Jason Ede]

Hi,

I don't know about sendmail I'm afraid. The actual postfix param is reject_unverified_recipient (http://www.postfix.org/ADDRESS_VERIFICATION_README.html) although need to be careful only run that on incoming email.

Jason

________________________________________
From: mailscanner-bounces at lists.mailscanner.info [mailscanner-bounces at lists.mailscanner.info] On Behalf Of Mail Admin [mailadmin at midland-ics.ie]
Sent: 03 June 2008 15:19
To: 'MailScanner discussion'
Subject: RE: Windows Exchange Server

Jason - Is there such a setting or configuration for Sendmail ?
"recipient_address_verification"

I relay mail for several domains, some of which are Exchange Servers. It
would be good to drop mail at MTA if Exchange Recips not VALID

Regards
Kevin
-----Original Message-----
From: mailscanner-bounces at lists.mailscanner.info
[mailto:mailscanner-bounces at lists.mailscanner.info] On Behalf Of Jason Ede
Sent: 03 June 2008 14:00
To: MailScanner discussion
Subject: RE: Windows Exchange Server

Aye, for postfix we use recipient_address_verification so our MailScanner
server never accepts emails that we cannot deliver onto the exchange servers
and requires no extra tweaking on our part... It has massively cut the load
on our MailScanner servers.

Jason
________________________________________
From: mailscanner-bounces at lists.mailscanner.info
[mailscanner-bounces at lists.mailscanner.info] On Behalf Of Ronny T. Lampert
[telecaadmin at gmail.com]
Sent: 03 June 2008 10:17
To: MailScanner discussion
Subject: Re: Windows Exchange Server

> I have numerous clients doing it this way and it just works.  If you are
> using sendmail as your MailScanner MTA I can provide complete help on
> how to make this work with MailScanner and exchange (all versions).

And I can help with postfix (+ Active Directory / LDAP)!


As for the inter-Exchange traffic: this really should be "trusted"
internal traffic, between internal servers, on an strictly internal network.
If it is NOT then it should not be allowed to flow freely between
servers directly.

In any case you should run a mail scanning virus scanner on your
Exchange servers so internal viruses can not propagate.


Cheers,
Ronny
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