We at Templ are focused on creating the best WordPress hosting service possible, hence we do not offer a full-fledged email service, but we do have SMTP-servers for outgoing emails. This can be used with free email services like Gmail for sending and receiving emails. Incoming emails can be forwarded by our SMTP-server to your Gmail account.
You can of course use your own domain name for sending and receive emails through Gmail with an address like email@example.com.
If you need more functionality than just sending and receiving emails, then we recommend the external Google service G Suite (previously Google Apps). Using G Suite requires you to change the DNS settings of your domain, if you are not sure how to do this, please contact us and we will assist you.
You can use any email service provider you want. You are not limited to our Gmail solution or G Suite.