Fix sync errors with the Gmail Android app

If your Gmail app isn’t syncing automatically, you might notice the following problems:

• Can't send mail, or mail is stuck in send
• Not getting new mail
• Can't open or read mail
• "Account not synced" error
• Gmail app is very slow

Troubleshooting steps

After you try each step, check to see if the problem is fixed.

Step 1: Update your Gmail app

To get the latest fixes on problems with sending or receiving mail, update your Gmail app.

Step 2: Restart your device

Step 3: Check your settings

Step 4: Clear your storage

If your phone or tablet is running out of space, syncing won't work. To clear space on your device:

• Uninstall apps you don't use
• Delete downloaded files or files you created, or move files to your computer
• Remove Google Play music, books, movies, or TV shows you've downloaded

Step 5: Check your password

On your computer, open Gmail. If you can't sign in or get one of the errors below, sync won't work on the Gmail app.

• "Username and password not accepted"
• "Invalid credentials"

• You're asked to enter your username and password over and over

Here's what you can do:

• Make sure you enter your username and password correctly.
• If you use 2-Step Verification, you might need to sign in using an app password instead of your regular password.
• If you still can't sign in, follow these troubleshooting steps.

Step 6: Clear your Gmail information

Warning: The following steps might erase your message drafts and your signature, ringtone, and other settings. Only follow these steps if the above steps didn't work.

1. Open your device's Settings app .
2. Tap Apps & notifications App info.
3. Tap Gmail Storage.
4. Tap Clear data Ok.
5. Restart your device.