Greetings all - I've just joined the list as I need some help with this problem.  
I have 2 companies that Anomy is seeing the following - and then dropping the attachment -

NOTE: An attachment named 7570__=0ABBE4DDDFC6D8BB8f9e8a93df93869@sitq.com was deleted from this message because it contained a windows executableor other potentially dangerous file type.Contact the system administrator for more information.--0__=0ABBE4DDDFC6D8BB8f9e8a93df938690918c0ABBE4DDDFC6D8BB--

The document in this message was a zipped up .doc file.

I'm hoping someone else has seen this in their travels, and can give me some guidance.