To forward a message from the Header window:
Select the message(s) you want to forward.
Click SELECT on the first message header.
Click ADJUST on additional message headers.
Choose Forward from the Compose menu.
The Compose Message window is displayed. Note the following:
The Subject text field is filled in. You need to fill in the other To text field, and if desired, the Cc text field.
The Text pane displays the original message.
The Attachments pane includes any attachments to the original message..
Type your message, and send the entire new message.
Refer to the section "Composing Messages".