AOL refusing my E'rage X emails

[tuqqer]

Title: AOL refusing my E'rage X emails

For the past four months,  a large majority of any email I send to an AOL address is getting bounced back, with the following type description:

> <[EMAIL PROTECTED]>: host mailin-03.mx.aol.com[64.12.137.152] said: 554-:
>     (HVU:NR) This email is rejected for containing one or more URLs which do
>     not follow RFC guidelines.  For additional inforCODE=DL0 554 TRANSACTION
>     FAILED

After speaking with both my ISP (comcast) and host (dreamhost), I found a tech guy at dreamhost who said

> This is a content based block of some sort. It does not appear that AOL
> is blocking our mail server... the "fault" then isn't really either with
> us or with your ISP. The only people who can ultimately tell you why this
> is happening are the people at AOL. My *guess* (a fairly well informed
> guess) is that you're sending mail in HTML format, and AOL is barfing on
> the way the URL is encoded. Try making sure you're sending plain text
> email, if you're not already, and see if you still get this error.

After getting this email, I tried sending a few test emails to some AOL friends, using plain text, and sure enough, they all went through.

My questions: is this a standard problem with Entourage X (10.1.4)? Is anyone else seeing this? Do you think the above tech guy is correct?

thanks as always.