DLP violation

Question

Emails keep getting quartered in under DLP violation, however the file is not in the policy! Support haven't come back to me in weeks and seem to ignore my emails. 
 
 Any ideas ?

Policy: 
 Base Policy

Rule: 
 Attachment file types (Inbound) 
 Category: 
 Attachment file types

smime.p7s:

Certificates

Stephen Stern · Answer

Yes, turns out the Sophos knows about the issue with default policy including the extension, but their document/KB which states which extensions it blocks doesn't state it as one of them. 
 Using a custom policy list and unticking certificates category may have resolved it.