I am trying to bind a service that I built to port 25. It is a rudimentary SMTP server in PHP.
The problem that I am having is that if I try to bind to that port ... the code binds to some other place, for instance: 39012.
The server is Amazon Linux 64 bits, I have already removed SendMail and rebooted.
If I try it, for instance, on port 1313, it works.
Is any block on ports? How can I fix it to work on port 25?