This is proving hard to troubleshoot! I just tried to send two email messages, both from the same email account. One went OK, but for the other I got the smtp error message and it is still in my outbox. If the settings were wrong, why would one email go, the other not?

In addition, I get the same error from the 3 email accounts I have in Outlook, two are web-based email addresses (Yahoo), the other a British Telecom (BT) address. I get errors from all. If I open the unsent email and click 'send' again, it often then goes. If not, closing and re-opening Outlook usually solves the problem .. until next time. Could that really be a server error rather than a problem with Outlook?

M. :-)