Thanks, I was able to do that, and confirmed that it works, mostly. The technicians are now receiving their new ticket alerts, and the customer is receiving their new ticket acknowledgement, however, the customer is also receiving a delivery failure (even though the ticket is opened and otherwise seems to be working):
This message was created automatically by mail delivery software.
A message that you sent could not be delivered to one or more of its recipients. This is a permanent error. The following address(es) failed:
pipe to |/usr/bin/php -q /home/XXXXXX/public_html/tms/api/pipe.php
generated by help@xyzdomain.com
The following text was generated during the delivery attempt:
------ pipe to |/usr/bin/php -q /home/XXXXXX/public_html/tms/api/pipe.php
generated by help@xyzdomain.com ------
<br />
<b>Warning</b>: Invalid argument supplied for foreach() in <b>/home/XXXXXX/public_html/tms/include/class.mailparse.php</b> on line <b>98</b><br />