How do I move all mail from an old to a new Gmail account

This is easily accomplished with a simple Gmail-utility Mail Fetcher and POP3. Step by step is as follows.

Entrance to the old account and settings (Settings) Select the tab Forwarding and POP / IMAP (Forwarding and POP / IMAP). In it, see POP-loading (POP Download) Mark item Enable POP for all mail (POP for all mail) And save the changes.

Thereafter, in the same section POP-loading (POP Download) Mark appears that POP is enabled. We again note the first paragraph.

Now it's time to move the letters to the new address, in settings (Settings) Which selects the tab accounts (Accounts). Next Section Get mail from other accounts (Get mail from other accounts) Click on the link Add another email address (Add another mail account). Following simple instructions, you can easily complete the configuration.

That's all! Wait for more, of course, have as Gmail, using POP, will move every letter from your old to your new account. But when everything is ready, any letter will now be within the new search box.

via Migrate All Your Old Gmail to a New Gmail Address