Use gmail to send mails as from other account

I use gmail as my main mailing account.Sometimes i need to send mails from other accounts(any other mail services like yahoo,rediffmail,hotmail, gmail etc).For that i have to login to that account and will send mails from there.But with using gmail no need to do that.There is a great feature which enables you to send mails from other account without login to that account.You can send mails from already login account in gmail.
For example i was logged into xyz@gmail.com(this one must be gmail account only) and i want to send mail from abc@gmail.com(or any other mail service account),then no need to login to abc account.Simply follow these steps.

• Goto settings in xyz@gmail.com(where you were logged in)
• Under accounts tab,click add another mail account and give the details
• Then it waits for verification.You can verify it by checking the verification mail sent to abc@gmail.com(which you have added account).
• At abc@gmail.com,check the link in mail or copy the verification code.
• Paste that verification code into verification given in xyz@gmail.com
• Finally you can send mails from xyz@gmail.com as from abc@gmail.com by selecting it at "from" location speicified while composing mail.

And also you can set that mail address as default mail sending account.This one is really cool feature.I've been implementing for my mail account and i feel comfortable because no need to worry about where i am logged in.