offlineimap3 VS Aegis

I suspect your new mail server supports IMAP. So you can run offlineimap to "sync" mails from Proton Mail to your server, as long as you have Proton Mail Bridge available.

I have also configured it that no deletes are synced, so I don't loose anything I delete by accident (sync_deletes). Also set the folderfilter to your liking. For all options check out https://github.com/OfflineIMAP/offlineimap3/blob/master/offlineimap.conf

Offlineimap can backup Gmail without problems, including the labels (they are added as X-Keywords header to the mail).

You can synchronize your email off gmail using offlineimap or any other similar program (you can and also should make a full request of your data with Google right now, because even an unmanaged dump can serve as a backup copy). You could then ensure you lose nothing by version-controlling the resulting maildir using git.

Part of this is due to bad software design. The email server provides a service, but nothing prevents you from backing up the emails you synchronize... except for software that doesn't allow it because the devs didn't give a shit.

So I have to ask, why JMAP? And does anything like offlineJMAP exist?

i can not longer use mu4e with my outlook account because of 2FA. I used to set it up through a combo of DavMail and offlineimap3, but now that doesn't work because DavMail can no longer create a bridge between outlook and imap, since I don' know how to get it working with 2FA.

On https://www.offlineimap.org there is still a link to the repository that uses Python 2 which is no longer supported. At https://github.com/OfflineIMAP/offlineimap3, development apparently continues with Python 3. There is version 8.0.0 available (https://github.com/OfflineIMAP/offlineimap3/releases/tag/v8.0.0)

For 1Password I use a Yubikey, but for 2FA in general, I have a backup phone running Aegis[1].

[1] https://getaegis.app/

Bottom line is, why in the world would you use a mysterious closed source app when there are better options out there? 2FAS is one of the better ones. Aegis Authenticator is another good choice for Android devices.

You can enable 2fa with amazon I suggest you do that with a 2fa app like aegis, that will greatly increase the security of your account and require the 2fa code to login to your account.

Aegis Authenticator has been a lifesaver for me: https://getaegis.app/

I use Aegis[1] on mobile and OTPClient[2] on my computer, both are regularly backed up on change.

I do not use the TOTP feature in my password manager (though I can split it to new DB in keepassXC) as feel it will defeat the purpose of 2FA.

[1] https://github.com/beemdevelopment/Aegis

Google Authentificator → Aegis