I have deployed a WordPress site in a Ubuntu 14.04 server. The problem is that the email notifications from the site aren't sent. I checked the firewall is inactive.
The port 25 is open, but the ports 465, 587 are closed. Unfortunately I don't have the ability for the moment to open these ports. Is there a way to use the port 25 to send the emails ? Or the problem is located somewhere else?
