Header and protocol questions

[Tim Johnson]

I'm using Mutt 1.2.5i on RH 6.0 with vim 5.7 as my editor.
When I post a message to a mailing list, and my own message
appears in mutt, I see "To....." in my message list. 
I believe that I am doing something wrong in my header setup.
Can anyone tell me why this is happening?
I have
set realname="Tim Johnson"
in .muttrc
Thanks...
-- 
Tim Johnson <[EMAIL PROTECTED]>
       http://www.johnsons-web.com