FirstClass(R) and SNDEMAIL

We use the FirstClass email system, and we also use Dave Leland's SNDEMAIL
utility (uses the QtmmSendMail API) to send emails from our AS/400. Very
recently, we've started experiencing a couple of problems:

1) All of our internal email addresses are lowercase, and any incoming
emails with uppercase letters in the name are rejected.

2) Outgoing emails with attachments using SNDEMAIL work fine as long as
they are addressed to a single recipient, but if anyone is "cc:"ed the
attachment becomes corrupted, and sometimes the email doesn't go through.

The first is definitely a FirstClass issue (and, probably not
coincidentally, a service pack was applied right before this started). But
the second has been an intermittent problem all along -- the difference
now is that it happens all the time.

Does anyone else use either of these, and if so have you run into these
issues? Of course, our AS/400 group is pointing the finger straight at
FirstClass, and the FirstClass person -- while admitting some
responsibility -- wants to blame SNDEMAIL for at least some of the
attachment problem. As "the man in the middle", I'd appreciate any ideas
about how we can find out what's going on and/or how to fix it?

Thanks very much!

Mike Naughton
Senior Programmer/Analyst
Judd Wire, Inc.
124 Turnpike Road
Turners Falls, MA  01376
413-863-4357 x444
mnaughton@xxxxxxxxxxxx