Mutt sending help

[Mike Mueller <linux-support@earthlink.net>]

I am beginning to use Mutt and nullmailer.  Nullmailer is sending via 
smtp.myisp.com.  I successfully sent email to myaccount@myisp.com from mutt.  
I cannot send to otheraccount@myurl.com with mutt.

I noticed the Return-path field in message from Mutt contain 
knoppix@edison.edison.  knoppix is the user account I'm currently logged in 
to and edison is the hostname of the node I am using.

Could the exim box at my webhost be rejecting my Mutt/nullmailer generated 
mail because of the unresolvable Return-path information?  If so, is mutt 
making the Return-path field or nullmailer?  Is there a way to get a 
resolvable value into the Return-path field?

Thanks
-- 
Mike Mueller
324881 (08/20/2003)
Make clockwise circles with your right foot. 
Now use your right hand to draw the number "6" in the air.