By selecting the box on the left hand side next to the team(s) you wish to email. This will bring up the email pop up displaying the admins and coaches for the team(s).
You can remove specific email address prior to sending by clicking on the X next to the name.
Add your subject and your body of the email and click the send button located in the lower right hand side.
The email will be sent from the address that you are logged in as.