You don't have to set anything up in your osTicket configuration nor config for this. You will need to have your desired email target forward (or pipe) to a program. This is easily done if you have a webhost using cPanel. There should be an option titled "Fowarders" on the main page of your CPanel main page. The option is listed under Advanced Options and choose "pipe to program". From there, you simply enter the FULL path to the /osTicket/api/pipe.php for each email address you want forwarded.In addition, you should also make sure that your pipe.php is CHMOD to 755 and not 644