Create Reminders to Follow Up on E-Mail You've Sent
You can set reminders to follow up on e-mail you've sent. When drafting an e-mail message, click the Follow Up flag. Previously, although this would create a flag both for you and for the recipient, you still had to look for it in your Sent Items folder. Microsoft Office Outlook 2007 now places a flag in your To-Do Bar tasks for this e-mail message by default.