exit status for cli script

[angeljusto]

I am writing a php script to run on CLI.

I am forwarding email messages to that script to be processed and then redirected. The script works perfectly, but I can't get rid of an error message that the mail server send every time the script is executed.

I think the server is sending the error message because my script should return the proper exit status, but i tried with:
exit(0);
exit;
return 0;

and it isn't working.

Anyone knows how should i terminate the script to get rid of that error message?

I post here the email message with the error in case it helps:

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 | /home/cagslc/mail_redir.php
generated by [e-mail]

The following text was generated during the delivery attempt:

------ pipe to | /home/cagslc/mail_redir.php
generated by [e-mail] ------

Content-type: text/html
X-Powered-By: PHP/4.3.8

------ This is a copy of the message, including all the headers. ------

As you can see, php is pasing "Content-type: text/html ..."
but why?
Thanks for your help.