Question

I am in the process of configuring POSTFIX for use of mail() function in php. I only want to send emails from localhost, and I am NOT interested in receiving emails. This is for testing only.

My POSTFIX configuration choices are:

1. No configuration
2. Internet Site
3. Internet with smarthost
4. Satellite system
5. Local only

Answer 1

Use Internet Site when you have a static ip address with reverse dns pointing to the hostname of your server.

Otherwise use Internet with smarthost and relay using your providers smtp server…