OpenSUSE :: Apps To Bounce Emails Back To Selected Senders?

there are any apps in Linux that allow messages to bounce back to the sender with a fake message saying the user does not exist or the email could not be delivered.

I have a stalker that keeps sending me disgusting emails on my primary gmail address, which I also use for work. He got my contact from a friend of mine (she was unaware he is mental i guess). Needless to say I replied a few times demanding he'd stop his cr@p, first in a polite way then even with insults and threatening to go to the police (but he is in another country so that's not a strategy I can use. Additionally in the country he lives - which is my native country - by law there is no restrain order unless there is first a personal attack and plus even in that case you have to get lawyers and pay lots of money for a court order).

Anyway, of course I already set up a filter in my gmail address that sends his cr@p right to the trash, and blocked him from any contact I have on the internet (Skype and Facebook). But I would like to pretend that my address does not exist any more or is not accepting emails any more by bouncing back a failure message so that this idi0t can stop once and for all. This disgusting email flood has been going on for almost a year.

I googled and found 3 windows apps that do that ( Bounce Email Spam Messages Back to Spammers with Non-Delivery Notifications | Raymond.CC Blog ) but I have not been able to find anything for Linux.

Does anyone know of any way to have a failure email bouncing back?