You can tell that your email provider supports HTTPS if you log in to your webmail and the URL at the top of your browser begins with the letters HTTPS instead of HTTP (for example: https://mail.google.com).
Ó lè mọ̀ bí apèsè ímeèlìi rẹ bá pèsè ìtìlẹ́yìn HTTPS fún ọ bí o bá wọlé sínú ìtàkùn-ímeèlì rẹ àti URL orí òkè aṣàwáríkiriì rẹ tí ó bẹ̀rẹ̀ pẹ̀lú lẹ́tà HTTPS nípò HTTP (fún àpẹẹrẹ: https://mail.google.com)