My Gmail account was working fine with PMAIL using my old log-in information until around noon yesterday when both POP/SMTP and IMAP stopped connecting and showed errors. Fortunately after I set up an app password for PMAIL on my computer, following the excellent instructions kindly provided by other users, they all are again working perfectly.
I am hoping Google will not decide to eliminate the app password option in the future if OATH2 can never be supported by PMAIL.
I do wonder however, if I wish to use PMAIL on a USB Flash Drive how I can utilize it as portable application on another computer without going through the entire process again and setting up a different app password for PMAIL and reseting the PMAIL internet log-in options for Gmail every time I plug it into a different device.