How to Fix iCloud Mail Folders Not Syncing (2026 Guide)

Why Are My iCloud Mail Folders Not Syncing?

Different users have reported different causes for why my iCloud Mail isn't syncing. The most common ones are:

1. Internet Connection or iCloud Server Issues

Sync depends on a stable connection to Apple's servers on both ends. A weak Wi-Fi or cellular data connection or an ongoing iCloud outage can stall folder updates before they reach every device.

2. iCloud Mail Sync Is Disabled

Check whether the Mail toggle under iCloud settings is switched off on the device. If yes, that device won't receive updates, even though sync is working fine everywhere else.

3. Incorrect Mail Account or Folder Settings

Incorrect account settings can make it appear that folders aren't syncing. The device may be signed in to a different Apple account, or the folder may belong to another email account.

Another reason why some folders are not syncing to iCloud is their storage location. The folder may be stored locally rather than under the iCloud header. These folders were never going to sync to other devices.

4. iCloud Storage Is Full

When the iCloud storage quota is exhausted, new emails and folder changes may stop uploading. So, the folders may appear frozen or out of date.

5. Outdated iOS/macOS Version Causes Sync Problems

Older software versions may handle iCloud sync differently after Apple updates its servers. They can also raise compatibility or authentication issues. This can create mismatches between an unpatched device and the rest of your account.

How to Fix iCloud Mail Folders Not Syncing

Now that we know some potential reasons behind iCloud Mail folders not syncing, let's move on to the best fixes. The methods below start with the simplest checks and move toward deeper fixes.

Method 1: Check iCloud Mail Settings and Turn Sync Back On

On iPhone or iPad, go to Settings → [your name] → iCloud → Mail, and confirm the toggle is on. On Mac, check System Settings → Apple Account → iCloud and make sure Mail is enabled there too.

Method 2: Restart Mail App and Refresh Your Account

Close and reopen the Mail app, or pull down to refresh the inbox. These activities often kick a stalled sync back into motion without any deeper troubleshooting.

Method 3: Remove and Re-add Your iCloud Mail Account

If iCloud Mail folders are not syncing even after a restart, remove the account from the affected device and add it back. This forces the device to re-download the full folder structure from Apple's servers.

Method 4: Update iPhone, iPad, or Mac Software

Install the latest available iOS, iPadOS, or macOS update. Software updates may include fixes for Mail, iCloud authentication, and account synchronization problems.

On iPhone, go to Settings → General → Software Update. On Mac, go to System Settings → General → Software Update. Install any pending update, then restart the device before checking Mail again.

Method 5: Check Missing Mail Folders on iCloud.com

Sign in to >iCloud.com and check whether the missing folders appear in Mail.

If they are visible on iCloud.com but not in the Mail app, the issue is limited to the device or its account synchronization.

If they are missing from iCloud.com as well, verify that they were not moved/deleted or created under another mail account.

What If iCloud Mail Folders Are Still Missing?

If none of the above methods have helped you solve why isn't my iCloud Mail syncing, let's figure out whether the data is still there or genuinely gone. There are two possible scenarios:

Scenario 1: The Emails Are Still Available on iCloud.com

When everything shows up in iCloud.com, this indicates the data still exists. So, the issue is abnormal device synchronization. Continue troubleshooting Mail settings on the affected device using the methods above.

Scenario 2: Emails Were Deleted or Are No Longer Available in iCloud

This means it is not a simple synchronization issue. iCloud Mail itself does not offer a function such as "restore all historical emails", so the options to recover those emails or Mail folders are narrow.

You may check:

• The Trash or Recently Deleted folder: Open Mail > Bin > restore the message if it's there.

• iCloud backup (if available): Restore the device from an iCloud backup made before the emails disappeared.

If your iCloud Mail folders disappeared after accidental deletion, failed syncing, or device issues, an iPhone data recovery software may help you retrieve lost data from available backups or your device.

Recover Lost iCloud Data with UltData

If iCloud Mail folder sync issues are only display-related, use Apple's official troubleshooting methods first.

Tenorshare UltData for iPhone does not recover emails directly from the Mail app. However, if email content was previously saved outside Mail---such as a PDF, an .eml file, or a downloaded attachment---UltData may recover the exported copy if it was stored in a supported location or included in an iCloud/iTunes backup. It can also recover other supported iPhone data, including photos, messages, contacts, and notes.

What UltData offers includes:

• Recover 35+ data types, including the Mail folders.
• Deep scan of internal storage for a high recovery success rate.
• Preview of recoverable data and restoration of all or selective files.
• Recover selective data from iCloud and iTunes backup without the need for full restoration.
• Support to recover third-party apps data as well, including WhatsApp, Instagram, WeChat, Messenger, etc.

Follow these steps to use UltData to recover lost Mail folders when iCloud Mail Folders not syncing:

• Install and launch UltData on your computer (Windows/Mac). From the main dashboard, click iPhone/iPad Data Recovery.

• Connect your iPhone to the computer using a USB cable.

• Select the data types to scan and click Scan.

• After the scan, preview the recoverable Mail app data and other recoverable files. Select the items you want to restore, then click Recover to PC.

That's how simple it is to use UltData iPhone data recovery software to recover lost iCloud data.

Note:

If you want to restore iCloud backup, check this guide on how UltData helps preview and recover selective data from iCloud backup without full restoration.

FAQ

Why isn't my iCloud Mail syncing?

iCloud Mail syncing usually fails due to a connection issue, a disabled Mail toggle in iCloud settings, full iCloud storage, or an outdated OS version. Checking these in order resolves most cases.

Why are some iCloud Mail folders missing?

Folders created "On My Mac" instead of under iCloud never sync to other devices, since they are stored locally rather than on Apple's servers.

Can I recover deleted iCloud Mail folders?

If the emails still exist on iCloud.com, you can recover deleted iCloud Mail folders because it's a sync issue. If they were actually deleted and aren't in Recently Deleted, use a data recovery tool to check the device or an iCloud backup for recoverable copies.

Conclusion

iCloud Mail folders not syncing usually occurs due to internet connection issues, disabled Mail sync, or an incorrect Mail account. That's why it is fixable in most cases by troubleshooting the sync problems. However, if you are sure that the data is lost and is also not showing in iCloud.com, use UltData iPhone data recovery software to restore the lost data from the iPhone's storage or iCloud backup.

Downloads:

UltData - Best iPhone Data Recovery Software

Rated on Trustpilot >

• Restore data from iPhone/iPad without backup or selectively from iCloud & iTunes backup (support preview before recovery).
• Recover 35+ iOS data types, including photos, messages, videos, call history, notes, social app data, and more.

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