I had a spam leak through today. The only thing in the html part was a link
to some site, with no hint of what was there. The plain text side was more
informative, in a way:

Content-Type: text/plain;
charset="us-ascii"
Content-Transfer-Encoding: 7bit

You have 2 options here,
Option 1 - You can put ANY text you want in here.

Option 2 - We will fill it in with the text only portion of the
html message if you put the macro for you: http://biglnk.com/DZp
in here.

NOTE: Some email clients don't disply html data. In that case
what you
put here will be seen by the recipient. If the email client
does
display html data then this will NOT be seen by the recipient.
Based on this you may wish to put a text version of your add
here;
however, you can also put some macros here to make the message
more random.