Recalling Email Messages in Outlook 2007
How many times have you sent out an email only to realize you forgot to include the attachment, or really shouldn't have sent a response to the entire company? If you are using Outlook in an Exchange environment you can attempt to recall the message.
The best solution to this problem is to implement a delay before messages are sent out, but even in that scenario you still might let one slip through, so this is the second line of defense.
To recall the message, go to your Sent Items folder and then open the message you shouldn't have sent.
On the Ribbon in the Actions group click on the "Other Actions" button and choose Recall This Message from the menu.
You'll get a confirmation screen where you can decide to just delete the unread copies or replace with a new message. Since you are in a hurry the best bet is to just delete.
The critical checkbox below will let you find out if the recall succeeds or fails for each person you emailed. This way you can send a followup message to the people that already opened your first email, and maybe mitigate the damage a bit.

This doesn't work flawlessly, but if you catch it in time you might be able to save some face.


This will only work if the other person clicks on the "recall" message, if he opens the original mail you stand no chance of recalling it. It's designed to work best with Exchange, if you are using POP it's not so useful, best to keep using http://www.howtogeek.com/howto.....ng-emails/
There are flaws in Outlook's mail recall system.
First, it only works if the person you are e-mailing is on a Microsoft Exchange Server.
Secondly, it leaves tracks behind. It informs the e-mail recipient that a message was removed.
There is a much better way to stop an email from being delivered after you have hit the send button. It's a web service called YankBack and it gives you a chance to stop an email mid-delivery. So if you said something you might regret later, forgot to say something additional, or just forgot to attach, you just click on an icon in your systemtray and you're taken to YankBack, where you can delete the email before it's delivered. It's based on a timer queue system, so you determine how long the delay period is. I delay mine 2 minutes which is plenty of time to get yank it back. It's saved my rump a number of times and it costs about $25 per year. It's like having an insurance policy against making fatal email mistakes.