Hope this help ( with the gmail mailing list ) :
Create personal mailing lists through contact manager
You can create custom "groups" of contacts so you don't have to remember individual names or email addresses. You don't create a true mailing list, per se -- it's just a simple way to email a handful of people at once.
To create contact groups, click "Contacts" from the left-hand navigation list and then click the groups icon:
After naming your group, browse for contacts you want to add to it. You can find them by clicking "All Contacts" or by searching by name or email address. Once you locate the contact you'd like to add to your group, click on the contact name, and select the "Groups" drop down menu in the right-most pane. You can add any contact to a group this way -- or make impromptu new groups. (You can also add people to groups by clicking a group name and then typing email addresses or names in the search box at the bottom of the middle pane).
The great thing about creating contact groups is that they "auto-complete": you can type the group name as you normally would type email addresses or contact names, and by selecting the group from the drop down menu, the group's contacts are automatically inserted. Your email recipients will not see your group name when they receive the email, but instead will see all the individual contact names and email addresses listed as normal.
