You can add contacts to make it easier to send emails.
Go to Google Apps and select Contacts App.
Step 1
2. On the Contacts page this prompt will appear, select "create contact".
3. This page will appear put in the required details and click "Save"
4. To assign a label to the contact click on edit contact as shown.
5, When the prompt appears click on the icon and add in the label name as shown. Click on save when completed. The label name will appear next to the label icon. Click save when completed