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Move Thunderbird Mail Items to Outlook via Gmail IMAP
Step 1: Enable IMAP Access in Gmail
You can use your Gmail account to sign in to Thunderbird and move mail items from Thunderbird to Outlook. But first, you need to enable IMAP access in your Gmail account. To do so,
Sign in to your Gmail account and open 'Settings'
Click on 'Forwarding and POP/IMAP'and then click the enable IMAP' radio button under'IMAP Access' section
Step 2: Sign in to Thunderbird using Gmail IMAP Account
Open your Thunderbird app and click on your Thunderbird email account
Click 'Email' under 'Set up an account'
Enter your Gmail username and password. Click 'Continue'
Click theIMAP radio button and then click on the 'Done' button
If you experience sign-in errors, follow the troubleshooting guide below on Gmail sign-in error.