Question about piping to external script (almost working!)

==== Required information ====
- iRedMail version: 0.8.6
- Store mail accounts in which backend (LDAP/MySQL/PGSQL): MySQL
- Linux/BSD distribution name and version: Ubuntu 12.04
- Related log if you're reporting an issue:
====

I'm trying to pipe mail from an account to an external command. I created the account and followed the instructions here

http://iredmail.org/wiki/index.php?titl … nal.Script

and it all seems to be almost working. If I tail my mail.log, I can see where the pipe is triggering, but I am told that the user doesn't have the permissions to execute the script. The script was created by root but I've tried changing the owner and group to vmail:vmail and it still isn't working.

This is the last step in my process. What do I need to do to make sure this script will execute under the right permissions?

Thanks!
Anthony