Well, maybe they're just over sensitive, but it seems that "See the attached file for details" will not match emails containing that string in their body. Right now would be a useful time to get this fixed, if it is broken, that is
Which filter are you refering to? The DirectAdmin filters, or the system_filter.exim filter? We havn't made any modifications to the system_filter.exim filter, so I'm not sure what issues might be arising from it.
I was talking about the DA filters. I think they work if you just want to block a specific email address, but they do not seem to be blocking emails with a specific string in the body.