Mail won’t sync on all devices

Hey there deb-91,

Thanks for reaching out to the Apple Support Communities. To get started, are you experiencing this issue with an iCloud email account, or another third-party email account? If you restart your iPhone and PC, does the issue persist?

Restart your iPhone - Apple Support

How to restart your iPhone X, 11, 12, 13, or later

1. Press and hold either volume button and the side button until the power-off slider appears.

2. Drag the slider, then wait 30 seconds for your device to turn off. If your device is frozen or unresponsive, force restart your device.

3. To turn your device back on, press and hold the side button (on the right side of your iPhone) until you see the Apple logo.

While restarting may seem like a simple step, it can sometimes help with resolving some unexpected issue like this.

If still having issues after restarting your devices, try removing and readding the email account to your iPhone.

If you can't receive email on your iPhone, iPad, or iPod touch - Apple Support

Remove your email account and set it up again

1. On your computer, sign in to your email provider’s website. Make sure that all of your email is there or make sure that your email is saved somewhere other than your device.

2. On your device, go to Settings > Mail, then tap Accounts.

3. Tap the email account that you want to remove.

4. Tap Delete Account.

5. Add your account again.

If these steps don't work, contact your email service provider for more information.

Keep us updated on the results.

Take care!