Email Forwarding to Pipe not working due Permission denied

[TuxADN]

Hello friends,
I need some help getting email piping to work please.
I've configured an email address to forward incoming emails to HelpDeskz pipe.php
The email is received and processed by Postfix, gets a Permission denied error, and it finally gets to the queue for later retry.

Email Log:

Aug 25 21:07:52 mail postfix/qmgr[754997]: 6D6DB401362: from=<external.user@gmail.com>, size=5458, nrcpt=1 (queue active)
Aug 25 21:07:52 mail postfix/pipe[791543]: 6D6DB401362: to=<my_email@domain.com>, relay=my_emailpipe, delay=1044, delays=1044/0/0/0.01, dsn=4.3.0, status=deferred (temporary failure. Command output: pipe: fatal: pipe_command: execvp /home/domain.com/public_html/pipe.php: Permission denied )

Pipe program is chmod 755 executable:

# ls -la /home/domain.com/public_html/pipe.php
-rwxr-xr-x 1 domai1234 domai1234 468 Mar  9  2021 /home/domain.com/public_html/pipe.php

This is a CyberPanel instance running on Ubuntu 20.04
Your help is appreciated.

[TuxADN]

Solved it.
Acatually what needs to be done is to modify postfix master.cf

Ensure what user and group the script is owned by:

ls -la /home/domain.name/path_to_script_folder

Modify master.cf

nano /etc/postfix/master.cf

Modify the pipe line with the command to execute:

change:
user=adminuser
to:
user=scriptuser:scriptgroup

Restart postfix

service postfix restart

Hope it helps anyone else, let me know.