see if anything here helps,
http://www.slipstick.com/mail1/longline.htm

"seanpaul99" wrote in message
news
i use office 2003 and have a problem that has become a mystery, when i type
an e-mail all is well but the recipient of the e-mail receives the message
in
a long line and has to scroll across the page to read the message. i am
using
HTML, 76 characters per line. i have posted this question in a few
newsgroups
but the issue has not been resolved.
--
seanpaul99