[cmipilot]

Outlook (not Express) has stopped sending. I am receiving fine. I have tried everything I can think of; been on the phone with GoDaddy (my domain is through them) and still no luck. I would really appreciate any creative solutions you have 'cause I'm out of ideas.

[tinmanpm]

You give no info? Are you XP, are you using a fire wall, then disable it temporarily,
Also disable the Microsoft Firewall. Could be firewall settings. Maybe you have 2 firewalls active at same time, not good. Are you using XP as the Administrator.
Reinstall Outlook.

[cmipilot]

You give no info? are you XP, are you using a fire wall, then disable it temporarily,
also disable the Microsoft Firewall. Could be firewall settings. Maybe you have 2 firewalls active at same time, not good. Are you using XP as the Administrator.
Reinstall Outlook.

Thanks for helping... Using XP, no firewall. Not sure what you mean by XP as Administrator. Since posting the question, I had to reset Outlook's defaults and recreate the account from scratch and it is now working. Still not sure what the problem was, but at least I'm able to send and receive again. Appreciate the suggestions.

[michealb]

Outlook profile will sometimes get corrupted and need to be recreated.

[jake5879]

He's given all the information necessary: emails previously sent with his given set-up, and then suddenly, spontaneously, without changing anything about the system, emails refuse to send. I think it's Microsoft employees who troll these boards saying "not enough information" as if it's "variable X" that caused it and not a random Microsoft spazz-out. Microsoft programmes changes itheir own settings spontaneously and randomly, it corrupts itself.
I had the same: email refused to send. Others sent fine. So after re-booting many times with no luck I 'forwarded' the email in the outbox to the same recipient - then I had 2 identical emails in the outbox, the one sent instantly, the other still refuses.