Postings by Peter Fraser

Increasing Internal security

Hi All
We had an auditor to an internal pentest for our network. The result for our Postfix box was (My Words) Although your SMTP server prevents relay in some circumstances, it still allows email from an empty domain. I am aware that the empty domain <> is needed for bounce messages. Is there a way to prevent an initial email out form an empty domain but still allow Postfix to use it internally for bounce messages?

Thanks and Regards