You can send follow-up messages to people in your address book who have not yet donated and thank you messages to those who have donated. To do so:
Click Send E-Mails from the top bar of your personal page.
Click either the Follow Up or the Thank You's tab.
Click the Send checkbox next to each person to whom you want to send the message.
Scroll down to the Subject box and enter the subject line of your e-mail (for example: "Thanks So Much” or "My Walk is Only Two Days Away!”)
Enter the text of your message.
When you are satisfied with your message, click Send E-Mails Now.
The E-Mails Sent column shows that you previously sent some kind of e-mail to the person and the date it was sent.