🚀 go-pugleaf

I am trying to configure sendmail to forward mail over a SLIP link
to our campus mail router.  Everything works fine if mail is sent
FROM the campus mail router over the SLIP link to the local node.
In addition, mail messages of a few lines are correctly sent from
the local node over the SLIP link to the campus mail router.  
Unfortunately when mail messages of more than ten lines (somewhere
between 500 to 1000 bytes [yes bytes]), the computers properly
connect, but they then time out.  I have sent mail using
"mail -v" and have seen the correct connection being made, but
then nothing happens until a time out occurs.  Since very
short messages are sent properly, I am at a loss.

The error message on the campus mail router (system that is
receiving the mail) is as follows:

Jan  9 11:11:28 turing sendmail[2764]: collect: unexpected close on 
connection from noether.fmn.cornell-iowa.edu: Connection reset by peer
Jan  9 11:11:28 turing sendmail[2764]: AA02764: SYSERR: collect:
unexpected close, from=<root@Cornell-Iowa.edu>: Connection reset by 
peer during collect with noether.fmn.cornell-iowa.edu

The error message on the local node (system that is sending the
mail) is as follows:

Jan  9 11:05:31 noether sendmail[1100]: AA01096: to=freeman@Cornell-Iowa.edu,
delay=00:08:41, stat=Deferred: Connection timed out during result wait
with turing.csc.cornell-iowa.edu

Does anyone have any idea of what these error messages mean?
Any help would be greatly appreciated since I am at a loss.

Please respond to freeman@Cornell-Iowa.edu since I am using
an account I rarely log into to make this post.  Unfortunately
this is the only way I can post to this news group.

Thank you!

Dr. James H. Freeman             freeman@Cornell-Iowa.edu
Department of Mathematics
Cornell College
600 First Street West
mount Vernon, Iowa  52314-1098