I've got a strange problem happening in 2007 and don't recall ever
seeing this in 2003. I sometimes get dozens of the same messages from
our server as if Outlook cannot delete the message properly off the
server using POP. I have to manually delete on occasion and now set
everything to be deleted off the server after I retrieve (I used to
have it set to delete after 2 days.)

Even worse is the latest regarding sending. I can no longer send mail
from any account except hotmail using pop. The rest of my accounts
have suddenly started to stick in my outbox and send themselves over
and over each time I send/receive email. This results in multiple
sends until I physically delete the message from the outbox (it never
shows up in the sent mail folder.) I've looked for answers for 2007
and don't seem to have any as of yet. Any explanations for these
anomalies?