In Outlook there is a 'Test Account Settings' button you can use - this generates and sends a test message to your email account. We have had reports that certain versions of Outlook fail as they do not appear to be sending the SMTP authentication (username and password) when sending mail.
We would recommend that you try sending an email anyway - most people have reported that sending mail normally worked perfectly and only the test failed.
If that does not work:
We have tested it ourselves using Microsoft Outlook 2003 and it seems to work correctly so it may have been fixed in this version onwards.
If you have any questions please contact us.