In IIS 6, there is the setting for a Masquerade domain for SMTP.
According to the MS article here;
"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 email@example.com
However, if I change the Masq domain on IIS1 to be IIS2, should the From: change to
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?