Creating contact groups
To create a contact group:
- Click Contacts along the side of any page.
- Click the New Group button located in top portion of the Contact Manager.
- Enter the name of the group.
- Click OK.
To add contacts to a contact group:
- Select the contacts in the Contacts list.
- Open the Groups drop-down menu.
- Under Add to... select the group you'd like to add the contact to, or select New group to create a new group.
Managing contact groups
To edit the contact group name:
- Click Contacts on the side of any page.
- Select the group you'd like to edit.
- Click Edit at the top of the page.
- Make your desired changes.
- Click Save at the top of the page.
To remove contacts from a contact group:
- Select the contact in the Contacts list.
- Open the Groups drop-down menu.
- Under Remove from... select the group you'd like to remove the contact from.
To delete a contact group:
- Click Contacts on the left side of any page.
- Select the contact group from the groups list.
- Click Delete Group at the top of the page.
- Click OK.
This will delete the group but not the actual contacts themselves. Those will remain in your Contacts list.
Sending to a contact group
It's easy to send to contact groups. There are two ways to address a message to a contact group you've created:
From the Contact Manager:
- Log in to Gmail.
- Click Contacts.
- Select the group you'd like to send to.
- Click All at the top of the contact list or select the individuals you'd like to send to.
- Click Email in the group details pane.
From the Compose window:
- Log in to Gmail.
- Click Compose.
- In the To: field, enter the first few letters of the name of the contact group to which you'd like to send the message.
- Select your contact group from the list of addresses the auto-complete feature suggests.
- Compose your mail.
source: http://mail.google.com/support/bin/answer.py?hl=en&answer=30970, http://mail.google.com/support/bin/answer.py?hl=en&answer=30971