When using IMAP with outlook we found that on some PC's they hang
when they send receive. Set the default inbox to be the one on the
server and not the local pst. 1 open outlook, but do not login or it
will hang (click cancel to any login dialogue boxes) 2 Tools,
options, Other Tab, Advanced options 3 Start up in this folder, set
to your inbox on your imap server, has fixed it every time for us.