MAMP Pro
If you try to send a mail with MAMP Pro you will notice that this is not working out-of-the-box. MAMP Pro uses postfix as you can find on the last tab of the MAMP Pro app.
- Just fill in 'gmail.com' at the Domain of outgoing mail and restart the server.
- Now open the mail log file which is located in the /var/log directory and you will see: