Hello mikeyned,

That must be so frustrating.

Would you please take a look at these articles :

https://support.mozilla.org/en-US/kb/cannot-receive-messages

https://support.mozilla.org/en-US/kb/cannot-send-messages

'Hope that helps .... (?)

It's a little funny that you replied to an email account that I could not access.... but, www.mikeyned.com and www.wb8mf.com are both owned by me and I have control of the email accounts. I am able to access the email accounts via the control panel. All send and receive functions seem to work correctly from the control panel interface. Removed and reinstalled Thunderbird but previous configurations popped back up. Uninstalled Thunderbird again and then deleted every file associated with Thunderbird that Windows would allow me to have access to. Reinstalled Thunderbird again and configured name and password like a normal new install. me@wb8mf.com email would still not function at all. me@mikeyned.com would receive email, still on the server, save a Draft (which it would not do before). but will not send mail. I saved screen shots of all the error messages but everything seems like a dead end. (NOTE: First screen shot or two are associated with me@wb8mf ... the rest are for me@mikeyned) Manually added Thunderbird to Windows Defender Firewall but no change. Feeling kind of stupid right now. [In case it seems relevant] There has been numerous recent emails on the me@mikeyned account claiming to have hacked my computer and that they had compromising video of me surfing porn sites and demanding payment via bit-coin but that is slightly impossible..... mIKEY Thanks for looking.

The server offers an SSL certificate issued for *.whpservers.com that is not the server that you are connecting to. I suggest you either try with a valid certificate or without STARTTLS / SSL / TLS connection security. Try NONE

https://www.immuniweb.com/ssl/?id=IeCoVWXK