Download all mails from Gmail-Download-Store-Synchronize your gmail to your computer

You can access your mail without an internet connection.Warning:Dont use this in public-shared computer .It will download your email messages onto computer. ok now just follow this

1.Go Gmail Settings

2.Click On Offline tab

3.Now you can enable offline gmail

3. Click Save Changes.

4. just follow google

We can download all mails,or selected mails from inbox, Chats, Sent Mail, Drafts,using labels etc.

You can also create a desktop shortcut to access offline gmail