SMTP server settings will not save in Apple Mail for Catalina
I am having issues with my SMTP server settings not saving, so my email account is offline after every restart and the closing / re-opening of Apple Mail. My account user name and password will not save.
The issue is the account name was entered incorrectly (when previously troubleshooting the password issue), so I have to correct it every time by editing the SMTP server list – after which my email operates fine (send and receive). But after closing mail and re-opening, the account user name reverts to the incorrect version, and the password disappears. Previously the Use TLS/SSL also turned off, but this now appears to be sticking.
This is a pop.gmail.com account which I use on my desktop. I use an imap version of this account on my devices (iPad and Samsung Note 8) so I do not want to use imap on my desktop.
I have tried to create a new SMTP server under a new name with the same account settings, but it disappears, never appearing in the list. Is there a bug in Apple Mail? Everything appears to be up to date.
Catalina 10.15.4 (19E287), Mail Version 13.4 (3608.80.23.2.2)