I've a problem with email notifications.

We have several support teams and each team has several team members. 

Depending on the users' site information, we collects requests in different pools which are dedicated to support groups.

For Example 

Site A >>> Team1

Site B>>> Team2

Site C >>> Team3

When a user from Site A submit a request, a notification mail must be sent to Team1 members (not to all technicians).

How can I accomplish that?

Regards

Tirelibirefe