New
#11
Yes, agree 100%, but that doesn't means that the virus runs at the mail server. It runs where you open it, in your local version of Word, your computer runs the malicious VBA code inside and it sends thought another mail. The mailbox is just a medium of distribution, but doesn't participate actively in anything, just transfers data. The mail account itself cannot be infected, but it can contain infected mails.
The OP probably go one of such Word documents or something like that, that began spreading itself using the mail. Maybe disabling POP access from the web mail can help, given that he doesn't uses it.