Assuming I can't get html view back, can I still use a mail client through POP3, or is the best thing to do to move to another email service, and if so which one?
https://www.bing.com/search?q=how+to+enable+pop3+and+imap+in...
I've heard good things about fastmail:
https://www.fastmail.help/hc/en-us/articles/360058752414-Mig...
It's not the UI that bothers me (it's actually quite nice and modern) it's that it loads like treacle, when in the past I exclusively used the basic HTML interface as it was more snappier & performant.