1.  Log in as the domain administrator.
   2. Click the Settings icon.
   3. In the navigation pane, expand the Domain Settings and Mailing Lists folders.
   4. Click Mailing Lists in the left tree view.
   5. Select the desired mailing list and click Edit. The mailing list settings will load in the content pane.
   6. Click Manage in the content pane toolbar and click Subscribers from the drop-down list. A list of subscribers to this mailing list will load in the content pane.
   7. Click New in the content pane toolbar.
   8. In the Email Address field, type the subscriber's email.
   9. Click Save.

For Multiple Subscribers:

Note: At a bare minimum, the .csv file must contain a column named "EmailAddress".

Follow these steps to add multiple subscribers to a mailing list at once:

   1. Log in as the domain administrator.
   2. Click the Settings icon.
   3. Click the Settings navigation pane.
   4. Expand the Domain Settings and Mailing Lists folders.
   5. Click Mailing Lists in the left tree view.
   6. Select the desired mailing list and click Edit.
   7. Click the Manage button in the actions toolbar and select Subscribers from the drop-down list. A list of subscribers to this mailing list will load in the content pane.
   8. If you wish to obtain a .csv file to use as a starting point, click on Download in the actions toolbar.
   9. Click Upload in the actions toolbar.
  10. To select a file to upload, click Browse and choose a .csv file.
  11. Click Upload in the actions toolbar to upload the file. Depending on the file size, it may take a few moments to upload.