Add list members singly - web interface
This section shows you how to add list members one at a time.
Login to the web interface.
Click on My Lists to show the lists you own or are a member of.
For lists that you own, you will see a button Review members.
Click on Review members.
Under Add subscribers" type in the email address of the person you wish to add to the list. If you do not want that person to be notified, then click on the box beside Quiet.
Finally, click on Add to add the email address.