If you're using Gmail on your android and your Gmail inbox is not updating, then don't stress to solve your problem here we are giving the 8 steps to fix the issue of Gmail not receiving emails.
- Use Gmail on a Different web browser
- Turn off email forwarding
- Disable antivirus
- Check Gmail server is temporarily down or live
- Delete email filters
- Clear Gmail storage quota
- Unblock the Block users Email ID's from the blacklist
- Configure Gmail accounts in third party email clients.
You can follow the mentioned steps to troubleshoot your problem and we hope that the steps will help you to resolve your Gmail problem.
See also - https://www.vevioz.com/read-blog/5022_how-do-i-fix-gmail-not-syncing.html