I've had this problem for awhile and tried various fixes. This is my last try then I give up. Can someone suggest an alternate email program is this can't be fixed? Any help appreciated. When Verizon switched to AOL I couldn't send or receive Verizon email. I read the post about app passwords, did that andIcould receive email. I've tried all the solutions posted for this common problem. The last suggestion I got was to change to oAUTH which isn't available in drop down but found somehow. When I made the change I could no longer send or receive. Switched back and can receive again. My Spectrum twc email has never been a problem. Everything works fine on AOL web mail. When sending email, Thunderbird doesn't accept app or regular password. Thunderbird 98.0, Windows 11 upgrade, calendar add-on.