Last night I was thinking about upgrading my laptop to Mint 18.1 even though 17.3 will still be supported for a couple more years. I don’t have much data on it but I figured I’d run a back up and make a list of applications and settings. The laptop was my only Linux machine that was receiving email (but not sending) from my hosted accounts I I figured I’d jot down the settings. I decided to compare them with the Thunderbird settings on my Windows 7 PC which was also receiving but not sending. The settings were different for some reason.
I brought up cPanel and checked the mail setup instructions which were different from either. I got the settings for the laptop and the Win 7 PC from cPanel at different times. Apparently, they occasionally change the recommended settings
I opened up Thunderbird on the main Linux desktop, changed the settings, and they worked. My inboxes began filling up. I successfully sent test messages from both accounts to my gmail. I also made adjustments to the settings in my sbcglobal account which I haven’t used in years except for PPOE login when AT&T was my ISP. And I added my new Time-Warner account.
So far it seems to be working. Another problem solved until the next time something changes.