I've tried the successful (for the other questioners) solutions offered in the articles that came up, but they didn't work. The one suggestion I couldn't try because the… (read more)
I've tried the successful (for the other questioners) solutions offered in the articles that came up, but they didn't work. The one suggestion I couldn't try because the option didn't come up, was to press the "stop" button to keep TB from searching for the provider, then enter all the info manually BEFORE choosing the "Manual config" option. I couldn't do that because no "stop" button ever appeared.
In any case, I did try entering everything manually a number of times (including the IMAP and SMTP info), trying each and all of the "Authentication" options in that dropdown menu. But TB still insists that either my username (new email address) or password are invalid. I've done this many times now, carefully, and... same result no matter what, even after shutting TB down and starting fresh. By the way, TB does enter all of the IMAP and SMTP info correctly by itself, exactly as protonmail.com lays it out.
I don't want to start fresh by deleting my current Roadrunner account (which shows a POP server, if that makes any difference) and replacing it with the protonmail account, because then I'll lose all my folders and everything. I'd like to delete RR down the road, though.
Oh, and by the way I've followed Protonmail's instructions on how to set up Thunderbird.
Any ideas on this? I'm stymied. Thanks.