My users are complaining that our email filter currently blocks .png file attachments. In reading on the web, png files are well known to host payloads. before I turn it on at the filter, I need to know we are safe.
I can't find any documentation on the sophos site that says it checks .png file attachments (i.e. someones signature) inside of email. I am assuming it does but I have never seen a sophos message relating to an email so I don't really know.
Our system:
Sophos Enterprise AntiVirus 10.0
Exchange 2007 server
Office 2010 outlook client
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