Firstly i would like a screenshoot.
Copy all the contents of an email in Notepad, remove your friends address, and post back here a screenshot.
Does your friend receive that text when you email to them?
Do you have a signature set at your emails?
If you change your Outlook Express settings to Rich Format text you still get the same text? Is there a link hiding in the text?
I asked a friend who has a MAC and a PC to send me emails to the new account in first html and second in plain text
What about having him set his settings in Plain text, do the same for your OE, and check a new email?
That text you are getting is a part of a joke.
If you google it, you will find all the joke.
Did you post any time at a Jokes site, or are you a member in such a site?
Clicked on the message entry in outlook express for each message (one at a time), went to properties, details, message source, went to full screen, and worms were in both messages though nothing showed in the message proper.
Checked in other messages and found the same result.
So that text can be seen only in the message source?
Can you copy here what you see there, except of your friends email address again?