I think I received an email virus from the ProZ.com site, is that possible?

Not really. Most email viruses exploit security holes in Microsoft software. As ProZ.com servers do not use any Microsoft software, it is extremely unlikely that a virus would be sent from ProZ.com. It is possible to receive viruses from other ProZ.com members, and it may even be possible for viruses to be attached to mail from ProZ.com, but only after it has left our servers and been processed by an infected machine.

No virus has ever been spread by the ProZ.com site or servers.