Our firewall/content filtering appliance sends me daily reports in the form of a PDF attachment. Since our upgrade to 8.0.2 (from 32 bit 6.0.14), PDF attachments seem to be blocked with the following error:

550 5.7.1 For security reasons we reject attachments of this type
However, when I go into the admin console, PDF is not a file type that is set to be blocked.

What do I do?