Content Filter - attachment stripping logic not working like I think it should

Question

Hello,
I am working on a content filter for stripping file attachments - my logic is this:
Condition: If File Type does NOT EQUAL file type Documents: attachment-filetype != "Document"
Action: Strip File Attachment by File Info: drop-attachments-by-size(0 bytes) 
My thought is that files that are not word docs, "test.ZIP" for example, would match the condition of not being a document. The match specifies that the action should then be performed on it - strip the attachment if it is over 0 bytes, which would be a match to any file. 
Right now, it strip anythings, documents included...its like the condition does not exist. I considered using Message Filters at first, but I need to provide a replacement message with each attachment I strip. Thanks in advance for your help! 

Answer 1

Hey Daniel
Your understanding is correct to a point.
The condition you set is correct, it will look for emails where attachments are NOT document files according to their mime structure.
Once this condition is met (IE: test.zip)
it will fall to the action
Your action however is set to drop all attachments greater than 0 bytes.
So for a setup like this I would suggest.
First content filter:
Attachment filetype is equal to "document"
Action for this content filter :  skip remaining content filters
Second content filter:
(Either no condition or Attachment filetype is NOT "document")
Action -> Strip if size greater than 0
The reason why all attachment filetypes are being stripped and even document is the condition simply states what needs to be seen to trigger this action
But this action is not set to exempt document files but to strip them all