You can configure mail lists, also called distribution lists, in your webmail account. When you send an email to the distribution list, it will be received by all members, also called participants.
1. Log in onto your webmail account:
The username is the complete email address, for example: firstname.lastname@example.org.
The password is the one you created when you activated this mailbox.
Click on "Sign in".
2. Go to Address book and click on "New". Then select "Add distribution list".
3. Enter the name of the distribution list and add the participants.
4. Click on "Create List".