Current Support Thread at Zen Cart Forums: https://www.zen-cart.com/showthread.php?217982-Developer-Override-Email-Address-Support-Thread
This plugin makes use of the built-in Zen Cart constant: DEVELOPER_OVERRIDE_EMAIL_ADDRESS. When that constant is set to a non-blank value, the zen_mail function sends all emails to the address (or addresses) specified by that constant. That allows you, as a Zen Cart developer, to use "live" data during your testing without sending unwanted emails to real customers!
The plugin should never, ever be used on a live site; its utility is on test-site clones of your live site.
There are no core-file overwrites or database changes associated with this module. Installation is simple:
Notepad++) the file /includes/extra_configures/developer_override_email_address.php, setting the email address(es) to which all test-store emails will be sent. If multiple addresses are required, separate the addresses using a comma (,).Delete the plugin's files from your store's file-system.