Help: Am I blacklisted?

[Evan Platt]

So a number of people didn't receive e-mails I send. Often, it's the same 
person who gets one but not another. ISP's vary. I run Merak which uses a 
SpamAssassin engine, and sent myself an e-mail - and it's marked as spam. 
The full headers below:

Received: from espphotography.espphotography.com ([127.0.0.1])
        by espphotography.com (Merak 7.2.0) with ASMTP id DEMO
        for <[EMAIL PROTECTED]>; Mon, 22 Mar 2004 20:52:35 -0800
Message-Id: <[EMAIL PROTECTED]>
X-Sender: [EMAIL PROTECTED]
X-Mailer: QUALCOMM Windows Eudora Version 6.0.3.0
Date: Mon, 22 Mar 2004 20:52:34 -0800
To: Evan Platt <[EMAIL PROTECTED]>
From: Evan Platt <[EMAIL PROTECTED]>
Subject: [Spam] Plus package
Mime-Version: 1.0
Content-Type: text/plain; charset="us-ascii"; format=flowed
X-Spam-Flag: YES
X-Spam-Status: Yes, hits=5.88 required=5.00 
tests=FORGED_MUA_EUDORA,BAYES_60 version=2.61
X-Spam-Level: *****
X-Spam-Checker-Version: SpamAssassin 2.61 (1.2.2) on espphotography.com

The message contained a phone number - nothing more.
Is there some problem on my end that may be causing ISP's to reject my 
message? If this message was a phone number and scored a 5.88, I'm 
wondering if a full message might be higher or flat out be rejected at the 
MUA level.

Forged MUA: I'm using Eudora as it says.
Bayes_60? Why?!
Any help appreciated.
Thanks.
Evan