Suppose our client, Bob, has the following email address: bob@isyouruncle.com. He has setup an auto responder on this address, so if you send a mail to it, it automatically replies with:
Thank you for contacting me, Bob, your uncle. I love you.
Now, suppose we have a helpdesk ticket system with the following address: helpdesk@needhelp.com. Everytime someone sends an email address, it replies with:
Your ticket number is ABCDEF. Thank you! :-) Bla bla bla.
Now, suppose bob sends a mail to helpdesk@needhelp.com. Here's what will happen:
Bob sends a mail to helpdesk@needhelp.com
Helpdesk replies to bob@isyouruncle.com with ticket nr
Bob's auto responder replies to thank for the mail that it received
Helpdesk replies to bob@isyouruncle.com with ticket nr
Bob's auto responder replies to thank for the mail that it received
Helpdesk replies to bob@isyouruncle.com with ticket nr
Bob's auto responder replies to thank for the mail that it received
Helpdesk replies to bob@isyouruncle.com with ticket nr
Bob's auto responder replies to thank for the mail that it received
Helpdesk replies to bob@isyouruncle.com with ticket nr
Bob's auto responder replies to thank for the mail that it received
Notice the infinite loop? So... how do ticket systems deal with this?
I use WHMCS, and I have no idea how to set this up to avoid infinite loops.