Here’s a little trick that most Outlook users don’t know about.
About once a week, I have to re-send a message. Most people, faced with this task, would simply forward the old message. But if you use Outlook 2002 or 2003, there’s a better way. Open your Sent Items folder, find the message you want to re-send, and open it. Click Actions, Resend This Message.
You can edit the message, change the To: address (handy if the original problem was that you mistyped the recipient’s name), and change the Subject. Click Send when you’re done.
Even cooler: You can do this with a message that someone else sent to you. With the message open in its own window, choose Actions, Resend This Message. When you click Send, Outlook will protest that you don’t appear to be the original sender of the message. Click OK and send it anyway. The message will be from you, “on behalf of” the original sender. If the recipient clicks the Reply button, his message will go to the original sender, not to you.