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How to import email from other accounts into Gmail
An easier way to read all your emails.
It works a bit like an enhanced version of IMAP, with added Gmail extras: spam filtering, support for advanced search operators, and the automatic sorting that puts emails in tabs. Choose that and you’ll be prompted to log into your second account as you do normally on the web or in the official app: with a username and password, and any two-factor authentication that’s set up. To see all of your emails on one screen, tap the menu button (three lines, top left), then All inboxes: This lists messages from all your accounts in chronological order.
Or read this on The Verge