Create service request with category based on rule policy routing

Hello Team,

We have a scenario where in system to update the category in the service request that is created from incoming email. Requirement is to update the level 4 (last level) category in the service request based on the routing defined in the rule policy.

For Example :

If email content contains enquire

then create

service request - yes

sent auto acknowledgement - yes

Route email to O:123456 -  credit department.

So from the above example , based on the routing -  system has to update the level 4 category in the service request that is created in the system.

Category 4 having the list of values like credit dept , finance dept etc.,

Please suggest.

Regards,

Kumar