Gmail is not the one and only email service available and not the first email service as well. But it is one of the coolest and craziest email service you can find now!!!
So I am pretty sure you have lots of emails out there in other email accounts your have. It can be in your hotmail, yahoo or outlook pst files and etc. GMail has decide to give the Mail and contact import function to everyone which was previously only came with new accounts. Now you can reunite all your emails and contacts in one place.
How to Import Emails and Contacts to Gmail?
This is what Gmail team has to say.
"
Now, with just a few clicks anyone can copy all of that to your Gmail account. It's easy — just go to the Settings > Accounts & Import page and click "Import mail and contacts." A window will pop out to lead you through the short import process. If you want us to continue to forward any new mail your other account gets for 30 days, we can do that too."
Isn't it a simple but important think that you've been waiting for?
Official Gmail Blog: Mail and contact import for everyone
