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Masquerade domain in IIS SMTP

Posted on 2009-04-13
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Last Modified: 2013-11-30
Hi Guys

In IIS 6, there is the setting for a Masquerade domain for SMTP.

According to the MS article here;

http://support.microsoft.com/kb/303734

"The masquerade domain replaces any local domain name that is used in any Mail From lines in the protocol. The replacement occurs on the first hop only"

Let's say I have IIS running on a server named IIS1 - an SMTP relay.
An application on AppSvr1 is configured to use IIS1 as its SMTP server to send alerts.

Normally, the From: address will be alerts@appsvr1.domain.com

However, if I change the Masq domain on IIS1 to be IIS2, should the From: change to

alerts@iis2.domain.com?

Or does this only apply to the protocol MAIL FROM:?

I have tested, and it doesn't change either the header From: or the protocol MAIL FROM:

However, the MS article does state: "The replacement occurs on the first hop only"

So, does this mean the Masq domain only takes effect if the mail actually originates from IIS1?
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Question by:kam_uk
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StefanKittel earned 500 total points
ID: 24133571
Hello

the domain does not change the mail itself.
It only changed the HELO name in the smtp protocoll

instead of "HELO host.companyA.local" you can use "HELO mail.companyB.com".

Stefan
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