Here's an interesting tip on how to configure your own mail server for OS X. It allows you to send email from your Mac wherever you are. Some hotels and hotspots require you to have your own SMTP server to send mail. First you need to download postfix. Extract it to the Desktop. Run the following commands from the terminal. cd /System/Library/Startup Items sudo mv ~/Desktop/Postfix . sudo chown -R 0:0 Postfix sudo chmod +rx Postfix/Postfix Once you have done this, you need to open /etc/hostconfig in your favorite text editor. I like vi. Newbies might prefer pico instead Click this link for the full HOW TO..