We just release freely a package that allows you block unknow people to create tickets on your system throught the email.

The system also bounces a customizable message to the sender.

It is also possible to move the unwanted message to a specify queue (something like Junk) instead of discarting it.

Please check this documentation for more information.

Obs: Complemento is not responsible for this package usage unless it is installed by our team on your OTRS instance.

Make the download bellow:

NewTicketOnlyFromKnowEmail-1.0.0

You can contribute to this project here:

https://github.com/richieri/NewTicketOnlyFromKnowEmail