Hello! I am trying to setup a php mail form for a client. They're telling me the form doesn't need to pass authentication to send the form since there are no relays? Basically the form is just for people requesting more information from their site. In return the company responds from a separate mail server.
Can I setup a php form without using smtp username and password? They're telling me to use their IP address only. I'm at a loss here. Can anyone please help??