I have been using Thunderbird since its inception. It has always been lagging in necessary features. I am starting to get frustrated with it. The final straw being that I can not collapse the account/folder tree. I had a quick look at trying to write an extension for it. But the learning curve is too high, and I don't even know if it will be possible.

I am looking for a client for Windows

1. Free or reasonably priced, preferably not a subscription.
2. Must support POP, not interested in IMAP.
3. Must work with MFA for Google accounts
4. Must support multiple email accounts with ease
5. Must work with Mailing Lists
6. Must import current emails from Thunderbird
7. Just want email, I don't care about Calendar or Tasks etc.

Any thoughts about **Mailbird**?