As of today I am no longer able to send email using Mac Mail. All of the messages remain in my outbox. I did not change any server settings, and it has been working flawlessly for months up to today. Does anyone know if something has changed with the outgoing server or if it is having problems today? As server I have listed smtp.live.com, authenticating with username and password, and using SSL. The mails simply sit in the outbox and no error message is displayed. Does anyone have any idea how to rectify this situation? The lack of an error message doesn't help troubleshoot the problem.

Thanks!