On the Mail page in the Hyperlink dialogue box you can edit hyperlinks for email addresses.
To access this command...
Click Hyperlink icon on Standard bar, click Mail.
Recipient
Assigns the specified email address to the hyperlink. Clicking the new hyperlink in the document will open a new message document, addressed to the receiver specified in the Recipient field.
Data Sources
Hides or shows the data source browser. Drag the receiver's Email data field from the data source browser into the Recipient text field.
Subject
Specifies the subject that is inserted in the subject line of the new message document.
Further settings
Frame
Enter the name of the frame that you want the linked file to open in, or select a predefined frame from the list. If you leave this box blank, the linked file opens in the current browser window.
Form
Specifies whether the hyperlink is inserted as text or as a button.
Events
Opens the Assign Macro dialogue box, in which you can give events such as "mouse over object" or "trigger hyperlink" their own program codes.
Text
Specifies the visible text or button caption for the hyperlink.
Name
Enter a name for the hyperlink. Office inserts a NAME tag in the hyperlink.