Prerequisite: The email accounts you'd like to fetch from must support POP access and, in the case of Gmail addresses, have POP access enabled.
1-Login to your Gmail account
2-Click the gear icon in the top right, click “Settings”
5-A new window opens. Enter the e-mail address that you want to fetch your e-mails from
7-Enter Username, Password and Pop Server values in the screen that opens. Leave the port value at 110
8-Click “Add account”
Now you should be ready to fetch the e-mails from your other e-mail account into your Gmail account.
You can repeat these steps to add more POP3 accounts to your Gmail account.
Hope this helps someone.