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I have a vulnerability that allows spoofing through telnetting SMTP on our exchange 2010 through the WAN interface(smtp public address) <br />
. If I disable anonymous user, would I need to create transport connectors for internal IP addresses that uses SMTP for emailing (apc, temperature, scanners)?
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I have a vulnerability that allows spoofing through telnetting SMTP on our exchange 2010 through the WAN interface(smtp public address) 
. If I disable anonymous user, would I need to create transport connectors for internal IP addresses that uses SMTP for emailing (apc, temperature, scanners)?

Telnet to SMTP Vulnerability- disable anonymous user

Exchange is the server side of a collaborative application product that is part of the Microsoft Server infrastructure. Exchange's major features include email, calendaring, contacts and tasks, support for mobile and web-based access to information, and support for data storage.