Deploying SMTP server on a private, local network

Question: How can I deploy your server in our company for use of our employees? They only want to send messages through it, they will be receiving their emails from another server.

Answer: Since you have a local, private network only, you will just need to set up our server on one computer and you do not even have to enable authentication for your users, they can be passed in by IP address.

Please take a look at the image below. Setup your SMTP server the same way, if you want only sending to be enabled for your users.

All you need to specify in your mail client settings in this case is the IP address of where your SMTP server is located. Since all filtering will be done by IP address, you will not even need any user name or password for it.