The Post.Office mail server is a background process that will start at the time your server boots up and remain running until you shutdown. You do not need to log in or start an application to run Post.Office.
Should you wish to start or stop the server manually, you may do so by logging in as an Admin user and issuing these simple commands in the Terminal application:
- To start:
sudo /usr/local/post.office/post.office
- To stop:
sudo /usr/local/post.office/post.office shutdown