Assign tickets to Support Group via email address

I've just inherited the role at an organisation looking after the administration of the Service Desk implementation.

One of the first changes I'd like to make is changes to which groups are assigned tickets based on the email that a request is sent to.

I've found 2 options that appear will assign the ticket to each group based on the email address, but unsure what the real difference is and what option is best if they are in fact different?

1. Assign an email address to the properties of the Support Group.

2. Create a Business Rule that will then assign the ticket to the Support Group.

Currently I have the Service Desk which receives the requests generated in their queue sent to the Support Groups email address(Su pport@abc.com) as the emails are forwarded to the Service Desk email address (Service@abc.com).

As emails sent to Support@abc.com are already forwarded to Service@abc.com which emails are fetched from, would either of the methods work fine? Or what would be the best method to use?

Any guidance on the best way to assign tickets to additional support groups from email based requests would be greatly appreciated.

Cheers,

Rob