smtp perplexities

[Jack <ostroffjh users sourceforge net>]

So I tried to send my previous reply, and it didn't work.  With each  
security setting, I got a different error:

SMTP over SSL: Connecting MTA frontier (smtp.frontier.com:smtp) failed:  
Error performing TLS handshake. An un expected TLS packet was received.

Require TLS: Connecting MTA frontier (smtp.frontier.com:smtp) failed:  
remote server does not support STARTTLS.

Optional TLS: Connecting MTA frontier (smtp.frontier.com:smtp) failed:  
no suitable authentication mechanism.

(by the way, in case anyone cares - frontier.com email is actually  
handled by yahoo, but I don't know which of them actually handles the  
smtp/pop3/imap/etc.frontier.com servers.)

I then started googling, and found a message I sent to this list in  
2011, suggesting using port 587 instead of 465.  At that point, I  
noticed the ":smtp" in the outgoing server (but not in the server for  
my other two mail hosts) and just removed it.  Now it seems to work.

However, that 2011 message was actually about debugging smtp.  Pawel's  
suggestion then was Preferences/Miscellaneous/Debug, but I have that  
set, and still see no SMTP related output to the console.  My next step  
would have been to dig out Wireshark.

Anyway, smtp seems to work for me, once I fixed some errors - but I  
have no idea how long that ":smt" was present, and whether the recent  
changes are what made it stop working.

Jack