You might be asking yourself why you might need such configuration. Well, some Internet Service Providers or hosting companies block the default SMTP port 25. If that is the case and port 25 cannot be unblocked, we can use alternative solutions. Such solution is relaying email via other port such as 587. Google's Gmail offers such capabilities and you can use your own Gmail account in order to send messages from your server. Here is how you can do it with few simple steps: