Thunderbird: Cannot send email but can read emails

[Daniel B. Thurman]

Patrick O'Callaghan wrote:
| Daniel B. Thurman wrote:
| > I cannot figure out how to get thunderbird to send
| > out email.
| 
| You could start by explaining what you've tried to do. At the 
| very least
| you need to configure an SMTP server.

I have the F8-Thunderbird account IMAPed to my SMTP server,
so I can read/send local email messages to local users.  But
I cannot send email Thurnerbird (IMAP) outbound non-local
messages.

I can use windoes outlook to send/receive local/remote emails
via the same SMTP server from which this message was sent.

I am trying to figure out why via F8->Thunderbird remote
outbound email messages are "refused" (Thunderbird give the
appearance of no errors) - I tried to send a message to
Fedora-Users but was unable to do so.

Any ideas?
Dan