From the menu bar, choose  File Send Send Message .

Alternatively, click the (E-mail...) icon in the tool bar.

The Send Message window appears.

Call up the distribution list and copy the members of the list to the window for editing the message.

Add the additional recipients to the list.

These can be system users, contact employees for your business partners, members of other distribution lists, and so on.

When you have entered all new recipients, choose OK to return to the Send Message window.

The list of recipients now contains both the members of the original distribution list and the added recipients.

Choose Save as Distribution List.

The window with the list of distribution list names appears.

Instead of entering a new name, select the distribution list that you want to supplement and choose Save.

Confirm the prompt to replace the selected distribution list with the updated one.