Gmail 400 Error
Gmail 400 error is a more frequent error. This is because the reason for the encounter can be very basic.
Here is the list of the reasons with their quick solution:
1. Clear cookies and cache in your browser.
2. Use the correct Gmail link (mail.google.com).
3. Update your browser to the latest version.
4. Disable extensions and try again.
5. Switch browser or device to rule out local issues.
6. Wait and retry later if it’s a Google server problem.
To avoid such scenarios, which can lead to data loss, try using a great Email Backup Solution.