A cool fact from gmail which i noticed only today..

1) When you create a Gmail account, you actually get two email addresses - one is the regular @gmail.com while the second email address has @googlemail.com in the domain.

That means if your email address in Gmail is something likebillgates@gmail.com, all email messages that are sent tobillgates@googlemail.com will also be delivered to your own Gmail account. That’s two for the price of one.

2) Gmail allows only one registration for any given username. Once you
sign up for a particular username, any dot or capitalization variations
are made permanently unavailable for new registration. If you created yourusername@gmail.com, no one can ever register your.username@gmail.com, or Your.user.name@gmail.com.
Furthermore, because Gmail doesn't recognize dots as characters within
usernames, adding or removing dots from a Gmail address won't change
the actual destination address. Messages sent to yourusername@gmail.com, your.username@gmail.com, and y.o.u.r.u.s.e.r.n.a.m.e@gmail.com are all delivered to your inbox, and only yours.

If you're homerjsimpson@gmail.com, no one owns Homer.J.Simpson@gmail.com, except for you. Sending mail to Homer.J.Simpson@gmail.com is the same as sending mail to homerjsimpson@gmail.com, or even HOMERJSIMPSON@GMAIL.COM.

NOTE :- For security reasons, when you log in to Gmail, you must enter any dots that were originally defined as part of your username.