Prevent Own Domain Spoofed Spam

Hi guys!

We got Exchange 2013 in the Internet facing ADsite.

If an externat user use telnet to port 25, we need to prevent that a mail from our own domain can be accepted.

In Exchange 2010, we prevent this removing the ExtendedRights ms-exch-smtp-accept-authoritative-domain-sender on ther Internet connector.

Now in Exchange 2013, we remove this ExtendedRights in the FrontEnd Internet Connector, but the mail is accepted anyway.

Any idea if this behavior change in Exchange 2013?

Regards,

Esteban

http://nextadmin.blogspot.com