How do I send e-mail to a group list using Comcast Webmail?
No Summary
Click the COMPOSE EMAIL button.
Select the To:, CC:, or BCC: link, depending on how you wish to deliver the message. To: is usually the default, however with group lists it is often considered good netiquette to use BCC: to avoid having your group list addresses fall into the hands of a spammer.
Select the group list you wish to send a message to from your address book. Note that group lists will have an icon (see screenshot below) to indicate that they are group lists. Click add.
Continue to compose your message as you would any other email.