'''I have been using Thunderbird for my email X@plethora.net since 2004. My son set it up. Now I have two additional emails, @mail. com, and I desperately need to be able to read them somewhere with a usable interface. One I had been reading in Apple's Mail app (also for many years, but Google locked me out of both of them on April 10. I have the emails back,, and it has screwed up everything else. I don't want to be stuck forever with https://mail.google.com/mail/u/0/#inbox and https://mail.google.com/mail/u/1/?pli=1#inbox. I have a MacBook, from 2021 or 22, which needs to be updated X@plethora.net has one open window, Thunderbird's inbox, and several tabs. Can I open a separate window for Y@gmail.com? I don't think I need to transfer the existing messages. My iPhone is X, I have an Apple keychain, with a passkey. I wouldn't mind phone calls or texts, but if I'm on a call, I don't know how to switch away (to receive a text) and then get back to the call. ''' (PII redacted by moderator)