Hi, I have been using Thunderbird for years. I have always used POP3. Recently I have run into a problem. I can receive emails from my Gmail accounts but I can no longer send emails. It just freezes and shows a “sending message” box. I have checked and checked on the settings and OAuth2 is set and I am out of ideas. Thunderbird works fine for other accounts, (GMX) oauth://accounts.google.com (https://mail.google.com/ …) entries are in the password listing for all accounts. So, I removed one the Gmail accounts and reinstalled it. I was asked to confirm that I want to allow Thunderbird to access the account and I agreed. Now THAT one works. I knew the account works because I set it up an a Portable Thunderbird first and it worked. Is there an easier way? I have EIGHT Gmail accounts an others that use OAuth2. (13) Also, I noticed that after I removed that account, the “pop.gmail-9.com” was still in the Mail folder. A new “pop.gmail-16.com” was created after the account was reinstalled. As a matter of fact, there are several “pop.gmail-?#.com” entries for accounts that were removed years ago. Can I delete them? Should I? Thank you. Joe