It's easy to export email addresses to use with other mail programs like Outlook, Constant Contact or MailChimp.
Go to the Email Center
Click on the the link from the Main Menu
Click on the Export email addresses tab
Select the list(s) you wish to export
Notice that you can select not only be all families but also create email lists by individual or Family Groups.
Create your list(s)
Select the folder where you want to create your list. If you selected ALL for individual or Family groups a unique file will be created for each.