Yest, but this is not "email". Not unusual to block all ports (incl. 25, 587, 465 and 110) except 80 adn 443. If you complain that email does not work then they check their "webmail" and say "what do you mean? Gmail works...".

This is not a major obstacle for me since I can pass through all ports via a http/https VPN but this is not how the internet is supposed to work.