Mozilla Mail apparently not wrapping lines at 72 characters

[Harshwardhan Nagaonkar <harsh@ee.byu.edu>]

I have this weird problem with mozilla mail *apparently* not wrapping 
mail at 72 characters.

I have the setting for wrap at 72 characters at Edit>Preferences>Mail & 
Newsgroups>Composition .

It appears to work just fine when I am composing emails. All my emails 
get wrapped when I am typing them out. The problem seems to occur when I 
send them. I noticed that all my emails in this mailing-list and 
elsewhere do not seem to wrap at all! Other people's messages nicely 
wrap and my replies go way off to the left instead of being in a nice 
readeable column. I wonder why this is happening. I don't want to annoy 
anyone by this unexplained behaviour. Any comments/insights would be 
greatly appreciated. I am running Debian Unstable, with Mozilla 1.3.1. 
Aww, I'll just post that big Mozilla string form Help>About Mozilla -

Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.3.1) Gecko/20030527 
Debian/1.3.1-2

Thanks a bunch everyone,
--
Harshwardhan Nagaonkar
Electrical Engineering Sysop
Brigham Young University, UT-84602