Easy instructions for email pipe to whmcs ticket
– you need to have email account created in cwp for this instructions to work.

In the configuration examples we will use username: testuser and email account space@test.com, don’t forget that you need to change it.

Edit File /etc/postfix/master.cf and add this at end of the file

whmcspipe unix - n n - - pipe 
  flags=Rq user=testuser argv=/usr/local/bin/php -q /home/testuser/public_html/crons/pipe.php -f ${sender} -- ${recipient}

Don’t forget to replace username and path with your actual path.

Edit File /etc/postfix/transport and add this at end of the file

space@test.com whmcspipe:

If you need to have multiple pipe scripts, you can add it as a new entry and replace the name whmcspipe to whmcspipe1 and so on…

once you are done, reload your new configuration:

postmap /etc/postfix/transport
service postfix restart