To add a mailto link:
In Page view, select some text or select an object to link.
If you place the insertion point in text without selecting text, the email address is inserted in the text as the link.
On the Standard toolbar, click the Link tool.
The Link dialog appears.
Select the External Link type.
Select mailto from the New link drop-down list.
In the text entry field, type the email address using the format username@domain.com.
Click Link.
Preview the page.
When you click the link, the browser’s email client displays a mail window with the address you entered in the recipient field, provided the browser is configured to send email using the HTML mailto command.