From: Joe Boyd Joe on
I started experiencing this problem quite suddenly with no changes at all to
the Outlook Express configuration. Messages seemed to be "stuck" in the
Outbox folder, but unlike what a number of existing posts already discuss,
the messages were actually being sent successfully. They just never got
moved from Outbox to Sent Items. The send/receive process completes with an
error, but if you look at details, all it says is "Warnings" for the send
step, no error codes or any other specifics.