I have 2 separate, but possibly related problems:
1. Outlook (2007) is trying to send messages although none are
Outbox. I've read this happened in 2003 as well, but was fixed either
by applying a 2003 service pack or running the inbox repair tool. I
ran scanpst.exe and it found errors, says it repaired them, but I
still have the problem.
2. In my Outlook I have Exchange setup via HTTP as well as a PST file
for the POP accounts. When I try to send via my POP accounts that
should use the PST outbox, they end up in the Exchange server Outbox.
The accounts are set to use the PST file, so not sure why this is
happening. One of the POP accounts still sends successfully (with the
resulting "Sent Item" ending up back in the PST's "Sent Items"), but
another one gets an error saying it can't find the SMTP, but my SMTP
settings are correct.