Outlook 2007 – Email glich

When sending email, after hitting “send” the email sits indefinitely in the Outbox and does not send. In the Outbox, the problem email’s is shown under “Date: None” instead of today’s date, and the lettering is normal (as opposed to the usual italics).

If I highlight the problem email in the Outbox, hit the ‘Reply to all’, a new email is created which will send OK.

Using Outlook 2007 and Windows XP & Norton Internet Security with outgoing email scanning turned OFF.

Any help would be greatly appreciated.