said Mike Bird via tde-users:
| On Fri February 6 2026 17:08:16 dep via tde-users wrote: | > Any expert on mail protocols here? | | (Postmaster since 1995) | | Since you're using IMAP which handles multiple clients well I suggest | you set up Thunderbird on the same box and see if it really does work | with Proton and if so see if you can drill down and find the difference | in how they behave.
Thanks. Installed Thunderbird. Forgot how much I utterly hate and despise Thunderbird. After an hour of remarkably colorful profanity, I've stopped poking around with it for now. Perhaps the mood to give it another try will return. At the moment it doesn't want to look at my main account but does want to tell me that the certificate for 127.0.0.1 has expired, which is kind of bizarre.
Thunderbird is what sent me to XFMail, which in turn sent me to KMail, which is kind of a Qt version of XFMail. Thunderbird sucked when it was part of Netscape and it sucks now.