I've noted how helpful Windows LIve Mail is in the past. You can use it to create an email list.

Go to Contacts in the folder list on the left, and then click Categories on the upper toolbar.

You be given the option to enter a category name. In the box below you can enter multiple email addresses.

When you draft a new email message and type in the category name it will autofill:

. . . and you can send out your email to multiple recipients.