Problem in Queue and case Creation

Dear all,

This is in reference to Queue creation and sending emails to queue on mail receipt. 

We have a DL named info@domain.com. Requirement is to create a case as a mail is received on info@domain.com

I have created a queue named info@domain.com and created a rule to create case too.

The process worked and cases were generating. But few days back, the queue stopped working. Now whenever a new mails comes, no case is generating. I have tried to recreate this queue and rule for case again and again but it is not working.

I have two more queues with other names QA@domain.com and register@domain.com, which are still working.

Please suggest what could be problem with this queue. Is it deactivated or there is some settings what I need to change?

Waiting for the solution.

Regards

Deepak Kumar