Duplicating Spam - Help!!!

Adventnet guys - Help please!

I am having the most incredibly annoying problem with my email account within Zoho VO. On March 13th, I received a spam email purportedly from a "Janet Clark". Without opening it, I deleted it. However, since that time I have received hundreds (no exaggeration!) of the exact same email. They come one right after another. In an hour, I might get 30-40 of these things. I delete them and, within minutes, more of these emails are in my inbox. Is anybody else having this problem?

I have checked my computer for viruses, spyware, adware, etc., and have found nothing. Other than this, my computer and all other programs seem to be running fine. Can anybody help? This is driving me nuts!

Thanks.

Laurie