(anti-spam-content-type' contains invalid characters, aborting request

[kushal]

Recently suddenly my website started returning the following errors:

(anti-spam-content-type' contains invalid characters, aborting request

I checked with each script and mod provider but all have said they dont sent this. This is causing forum to not allow attachment / image getting downloaded and return the internal error 500.

Can anybody point out what can be done?

[z3r0]

I've never seen anything like that before, while you are waiting for somebody that may know about it, have you checked your attachment MIME type & Headers to make sure nothing is screwed up?

Example of one of mine below.

Attachment 155785

[kushal]

Oh! Thanks

This is what was an error. I corrected it.

[muhsayd]

Hello,

Thank you for your hent, It helped me fixing my issue displaying the forum attachments.