Sign in to continue to your mail.
Connect an existing mailbox to this client.
Gmail and Yahoo need an app password from account security settings, with two-factor authentication enabled. Outlook.com and Microsoft 365 generally require OAuth, which this build does not implement.
Reconnect a mailbox or detach one from this client.
Remove from this client?
This only detaches it from this client. It does not delete the mailbox or any mail on the server.