Ok… You have finally taken a decision to migrate from your webmail to Gmail, you don’t want to lose your old messages and the address books, what can you do? In such a situation, you can use the Mail Fetcher feature offered by Gmail. It is supposed to work with all mail services like POP, comprising Hotmail and you can’t use this for your regular Yahoo Mail accounts.
Already there is a feature available that lets you import contacts and mail from popular services like Yahoo Mail, Hotmail, AOL Mail and from ISPs like Verizon, Comcast, Earthlink. If the tab is not available named “Accounts and import” in Gmail’s settings, then you may have to wait until the feature is enabled for your account.