Emacs sends mail, but doesn't show-up in exim.

[Robert Cymbala <cymbaLa@lafn.org>]

I COULD USE some advice on where to begin trouble-shooting the
following problem.  Sometimes email that I send from Emacs (using C-x
m compose-mail) does _not_ appear in exim.  Buffer *Messages* says
"sending... done" but sometimes the email does not appear in
/var/spool/exim/input (they accumulate there until PPP connection).

Mail to "rcymbala@yahoo.com" gets into exim's queue, but mail to
"cymbala@juno.com" does _not_.  Mail to "sam.michalowski@juno.com"
does _not_ appear in exim.  Glad I caught that fact, but I wonder how
many other messages disappeared into thin air.

Packages installed:
 http://www.lafn.org/~cymbala/dpkg_l.html

.emacs:
 http://www.lafn.org/~cymbala/_emacs.html

Help!  thank you