Excuse my previous message. I hit the wrong key and sent it off a
bit early.
Anyway, as I was saying, I have solved my problem with Exim
messages coming into my Exchange server. Something I neglected to
mention in my original message was that the Exchange server is sitting
behind an ISA server. It turns out that the SMTP filter on the ISA
server was causing the problem. Turning off the SMTP filter has fixed
the problem.
Thanks again to those who offered advice.
Cheers,
Joel Gaskell