Since I switched over to the mailhost beta, I'm now finding that my hosting company has deactivated my account. Seems to be connected, but I'm not technical enough to verify this. I'm including the email in question. It is indeed a reported SPAM that I submitted, but I'm not clear why it's getting my account slammed.

Thanks for the understanding if this isn't related and I'm posting in the wrong place.

-Geoff Miller

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[ Offending message ]
Return-Path: <pedidos_vigo[at]yahoo.es>
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for x; Sat, 03 Apr 2004 12:19:06 -0600
From: "CIGARRETES" <pedidos_vigo[at]yahoo.es>
Subject: BUY CIGARRETES / FREE SHIPPING
To: x
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Reply-To: pedidos_vigo[at]yahoo.es
Date: Sat, 3 Apr 2004 20:19:05 +0200
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*** WE ARE SELLING CIGARRTES FOR ALL THE WORLD ***

hi, cigarretes in your country are very expensive...mow you can buy
cigarretes from spain to the world !!!!

see our prizes and  send  a email with your  preference and your contact
dates (name,street,cp,country)

SEE OUR RATES!!!

200 cigarretes of camel to 35 dollars (free shipping)
200 cigarretes of winston  to 35 dollars (free shipping)
200 cigarretes of lucky strike to 30 dollars (free shipping)
200 cigarrttes of chesterfield to 30 dollars (free shipping)
200 cigarretes of L&M to 30 dollars (free shipping)

TO BUY CIGARRETES YOU CAN SEND A EMAIL TO pedidos_vigo[at]yahoo.es

WE CONTESTS TO YOU WITH MY DATES TO PAY THE SERVICE !!!

pedidos_vigo[at]yahoo.es

Did you also bounce it back to the supposed sender? If the forged address was a real person, they may have reported you as a spammer, assuming your bounce was just a sneaky way to send a spam.
Do you have a challenge-response filtering service (no mail gets delivered until the sender replies to an email confirming identity)? I don't think you would get the entire email back like this, but they also get reported as spam a lot.

Send your registered SpamCop email address to deputies <at> spamcop.net along with a short note as to what has happened and one of us will take a look at your mailhosts configuration.