Import Windows 10 Mail into Gmail
To move messages between accounts in Windows Mail:
Import Outlook for Windows 10 Mail to Gmail
The process for moving messages between accounts is the same in Outlook, but the interface in a little different:
How Does This Work?
To migrate emails from other accounts into Gmail, you must first set up both accounts in the email client of your choice (e.g., Windows Mail or Outlook). Be sure to use the Gmail IMAP settings when setting up that account. You might also want to make a new folder in Gmail specifically for your imported messages. As long as your Gmail account is set up to communicate with the Gmail IMAP server, anything you do to Gmail on your computer will sync with the online version. As a result, any emails you copy to Gmail from your other accounts will be uploaded to your online version of Gmail. The next time you read your Gmail messages from the Gmail mobile app or website, you’ll see those same messages that used to be stored only in Outlook or Windows Mail. Though not as smooth, an alternative method is to use Thunderbird. To do that, you have to first import the messages from Outlook or Windows Mail into Thunderbird and then copy the Thunderbird messages into Gmail. Aside from manually copying all new messages into Gmail each time they come in, you can also set up your email client to forward messages to Gmail automatically or configure Gmail to check mail from your other account(s).
