There is an email on the server that stops 3 different clients from downloading it.
When I delete the email from the server all the legitimate emails download.
This email contains the following in the body and the url to the zip file is mastermatrix.com/bad/file.zip
I've never run across an email that would stop the client download and then not let anything else download.
I forwarded this message to my hotmail account and it says it is a virus and it is WORM_MYTOB.AO
there are references on trend micro but none related to this problem.