if you know it then it is well and good if you don't know then follow this simple tutorial that helps you in undoing an E-mail.
Step By Step Guide for Undo/unsent a send email
Now i guess this make you a clear idea how you can undo a send email .
Well if you have two email id then you can test it and verify it thats all for today .
Actually this post is demanded by one of my close mate "Suranjan Mund" So buda i guess you will like this .
Thank you everyone do share :)