Thunderbird 78.14 64 bit freezes at SEND
Macos 10.9.5 Mavericks with the above mail program installed. Tbird works fine receiving email from my imap server, and other functions seem ok too. Except any attempt to send a new or forwarded email to my smtp server (same ID and password as IMAP) immediately freezes with the circular colored ball. Other apps running continue to do so, and I need to FORCE QUIT Tbird. I'm able to get a dump from the forced quit, but don't recognize anything in it (could be me) that's of use to solve the problem.
Looking at Privacy&Security/Saved Logins just the IMAP server info is listed and the port/password is correct, but there's no separate SMTP entry since it should use the same logic and password as IMAP.
Could it be a bug in this particular version of Tbird? Or where else can I look?
The older Firefox I downloaded seems to be working fine.
Thanks.
--Bill Blue