Gmail’s New POP3 Option
When you choose to use Gmail for your POP3 email client instead of using a POP3 email client (like Thunderbird, Outlook etc... some) email programs show both your Gmail address and your POP3 email's address.
I do this at work because I prefer Gmail for its superior spam protection, and because when I want to access my email I don't have to be at my home or office, and I don't need to worry about transferring emails, settings and such every timwe I get a new computer. So at myemail@gmail.com I get email from mywork@myjob.com, and until now some email programs would show my emails as:
From myemail@gmail.com on behalf of mywork@myjob.com
Not so cool, but now I don't have to face that.
Read the Gmail blog post that explains how to do this...
New Gmail POP3 settings
i want to change my acc from orkut to gamil
I'm not sure exactly what you want to do because I've never used Orkut. Can't you login to http://www.gmail.com with your Google account login?