Headache wrote:

This is the Error message in full:
Task 'Hotmail-sending' reported error (OX800CCFO)..The service is
currently unavailable.
try again later. The server responded 'service unavailable'.....after
trying to send i then go into the outbox and then click and it then
says message not sent!...any ideas please????

If this Hotmail account a paid one (i.e., Hotmail Plus or Premium)? If not,
that's why. Free Hotmail accounts are not accessible by Outlook. If it's a
paid account, however, you should call Hotmail support, since you pay them
for it.
--
Brian Tillman