[ale] I almost have sendmail working but for one slight problem

[Jim]

I have a half dozen systems scattered about and have never gotten any of 
the RH variety to be able to use sendmail (or any of the other mailers) 
to send using my bellsouth connection.  I finally bit the bullet and 
found a web site that discussed how to do it.  It didn't work but I was 
able to figure out most of the problems, however the last one has me 
stumped.  

I can make mail -S test jim at somewhere.net from the command line as long 
as the hostname of the system I'm on is 
adsl-065-xxx-xxx-xxx.sip.asm.bellsouth.net.  However I'd like to be able 
to mail from more than one system in the group and I really want to name 
them something meaningful and don't want them all the same.

If I don't have the host name then I get errors like:

stat=Data format error
and
Mar 26 10:41:15 devel sendmail[23673]: l2QEfFXI023670: l2QEfFXH023673: 
DSN: Data
 format error

The only difference in the logs is the senders address, it seems:
Mar 26 10:41:15 devel sendmail[23673]: l2QEfFXH023673: 
to=<jim at devel.localdomain
 >, delay=00:00:00, xdelay=00:00:00, mailer=local, pri=31618, dsn=2.0.0, 
stat=Sen
t


So is there a way to tell sendmail my host name is that horrible adsl 
line but leave the system hostname alone?

Thanks,
Jim