Mike Hollywood wrote:

when i test accout settings, there are no errors,
"find outgoing smtp server ... completed"
all others are completed, too.
so... I removed the account, shut down outlook,
re-opened and reconfigured the account
and the same error msg pops up
when I try to send something.

The test message isn't conclusive evidence that your settings are configured
correctly. Click ToolsE-mail AccountsNext, select the account through
which you're sending, click Change, then More Settings. On the "Outgoing
Server" tab, check the box that says "My outgoing server (SMTP) requires
authentication" and see if that helps (which is what Mcspec was telling you
you should do).
--
Brian Tillman