Sending mail from Thunderbird - Error incorrect greeting

[tenmei]

OK, have to face my limitations. I can't find what's wrong. My server seems to be working fine but I want one client for a number of accounts, and Thunderbird reports, "The mail server sent an incorrect greeting: * OK myservername.com Zimbra IMAP4rev1 server ready".

Can anyone give me a hint or clue? TIA

[soxfan]

What port do you have configured for sending email in Thunderbird? Seems like you might be using an IMAP port instead of SMTP, or something like that.

[tenmei]

Thanks soxfan - just had a wild thought, maybe should also pursue this on TBird forum?
Using Imap settings on TBird, port 993, SSL/TLS

[soxfan]

I may be wrong but I believe port 993 is used for securely receiving IMAP/S email, not sending email. I haven't used Thunderbird in a long time, but isn't there a separate spot in the settings to set-up an outgoing mail server? Typically it would be an SMTP server using port 25, or 587 for secure SMTP.