Overview
The default regular expression rule in advanced content filtering detects some postal and zip codes as well as social security numbers.
Environment
GFI MailEssentials 2012 / 20120913
Resolution
Upgrade to GFI MailEssentials 2015 or later.
If you cannot upgrade at this time, change the rule to the following expression:
\b(?!000)([0-6]\d{2}|7([0-6]\d|7[012]))([ -]?)(?!00)\d\d\3(?!0000)\d{4}\b