Here is something that may help if you have just sent email to someone that you made a big mistake on.. note however, that it will only work if the ISP accepts microsoft exchange commands in which case so long as the recepient hasn't checked their mail box and the mail is still at the ISPs server, you might have a chance...
Here's how:
This feature requires you to be using a Microsoft Exchange Server e-mail account.
You can recall or replace a message only if its recipient is logged on and using Microsoft Outlook and has not read the message or moved it from their Inbox.
In Mail, in the Navigation Pane (Navigation Pane: The column on the left side of the Outlook window that includes panes such as Shortcuts or Mail and the shortcuts or folders within each pane. Click a folder to show the items in the folder.), click Sent Items.
Open the message you want to recall or replace.
In the message window, on the Actions menu, click Recall This Message.
Note This command does not appear unless you are using an Exchange e-mail account.
Do one of the following:
Recall the message
Click Delete unread copies of this message.
To be notified about the success of the recall or replacement for each recipient, select the Tell me if recall succeeds or fails for each recipient check box.
Replace the message
Click Delete unread copies and replace with a new message.
To be notified about the success of the recall or replacement for each recipient, select the Tell me if recall succeeds or fails for each recipient check box.
Click OK, and then type a new message.
Note To replace a message, you must send a new one. If you do not send the new item (item: An item is the basic element that holds information in Outlook (similar to a file in other programs). Items include e-mail messages, appointments, contacts, tasks, journal entries, notes, posted items, and documents.), the original message is still recalled.
