[otrs] How to allow email tickets from a group only

[Bulent Oktem]

Hi,

I  have several queues with different groups having write access to it. In the 
Web user interface only those groups can create tickets in these queues as 
expected. 
However, sending a ticket via email and filtering that into one of these 
queues have no group control. How can I control the group of the sender 
(email->group) and reject the ticket if that customer is not in the group of 
the queue?

Regards,
Bulent Oktem