The email system offered by Serv00 is relatively simple and does not have an option to set 2FA. If you are afraid of losing access to your email you should contact the owners of the website gkl02.serv00.net directly and ask them to be nice and not change your email password without reason / without your permission, or snoop on your stuff, since they have full power to do so.
If you are the owner of the website, great, just set a more secure password for the email you created in your Serv00 panel and you will be fine.