iPhone Mail App Crashing in iOS 11? Fixes That Work

Yes, the iPhone Mail app crashing in iOS 11 is a known issue that affected many users after updating. The crashes typically happen when opening an email, refreshing the inbox, or searching, and are often caused by a corrupted mail account cache or a bug in the iOS 11 Mail app itself. Below are the most effective fixes, from simple restarts to account re-setup, along with background on why this happens and how to prevent it.

Why Does the Mail App Crash in iOS 11?

iOS 11 introduced a redesigned Mail app with new features like swipe actions and a top search bar. However, it also brought a set of bugs that caused the app to crash unexpectedly. The most common triggers were:

• Corrupted mail cache: When the Mail app stores a large amount of cached email data, that cache can become corrupt during an iOS update, leading to crashes when the app tries to read it.
• Third-party account issues: Accounts like Gmail, Yahoo, or Outlook sometimes have authentication tokens that don’t sync properly with iOS 11, causing the app to crash when verifying credentials.
• Memory pressure: iOS 11 had memory management issues, especially on older devices like the iPhone 6 or 6s. If the Mail app used too much memory, it would be force-closed by the system.
• Search index corruption: The new search feature in iOS 11 built an index of all your emails. If that index got corrupted, opening the search tab or typing a query could crash the app.

Apple released several updates (11.0.1, 11.0.2, 11.0.3, etc.) that fixed some of these bugs, but many users still experienced crashes even on the latest iOS 11 versions. The fixes below work for all iOS 11 versions.

Quick Fixes to Try First

Before you go through the more involved steps, try these simple solutions. They take less than a minute and often solve the problem.

1. Force-quit the Mail app: Swipe up from the bottom of the screen to open the App Switcher, then swipe the Mail app preview up and off the top of the screen. Wait a few seconds, then reopen Mail.
2. Restart your iPhone: Press and hold the side button and either volume button until the power off slider appears. Slide to power off, wait 30 seconds, then turn it back on.
3. Check for a software update: Go to Settings > General > Software Update. If an iOS update is available, install it. Many crash bugs were fixed in later iOS 11 point releases.

If the app still crashes after these steps, move on to the more thorough fixes below.

Re-Sync Your Mail Accounts

A common culprit is a mail account that has gotten out of sync. Re-syncing forces the Mail app to re-download the account settings and refresh the connection. Here’s how:

1. Go to Settings > Accounts & Passwords.
2. Tap the account that is causing issues (e.g., Gmail, Yahoo, Outlook).
3. Toggle off Mail and wait about 10 seconds.
4. Toggle Mail back on. This will re-sync the account.
5. Repeat for each account you have.

If you have multiple accounts and the app crashes when you open a specific one, this fix is especially effective. It forces the Mail app to re-establish the connection without deleting any emails.

Delete and Re-Add the Problem Account

If re-syncing doesn’t work, the next step is to remove the account completely and add it back. This clears any corrupted authentication tokens or account settings that might be causing the crash.

Important: Deleting an account from your iPhone does not delete emails from the server. Your emails will still be on Gmail, Yahoo, Outlook, etc. You will only lose any locally stored drafts or cached attachments that haven’t been uploaded.

1. Go to Settings > Accounts & Passwords.
2. Tap the account you want to remove.
3. Scroll down and tap Delete Account.
4. Confirm deletion.
5. Then tap Add Account and re-enter your email credentials.

This is the most reliable fix for account-specific crashes. If the crash happens with all accounts, you might need to delete them all and add them back one by one.

Clear the Mail App Cache (Without Deleting Accounts)

If you want to clear the corrupted cache but keep your accounts, there’s a trick that works on iOS 11:

1. Go to Settings > General  > iPhone Storage.
2. Find Mail in the list of apps.
3. Tap on it, and you’ll see an option called Offload App. This removes the app but keeps its documents and data.
4. Tap Offload App and confirm.
5. Then tap Reinstall App (the app icon will appear on your home screen).

This will reinstall the Mail app without deleting your accounts. The cache is cleared, and the app starts fresh. Your emails will re-download from the server. This is a good middle-ground fix if you don’t want to go through the hassle of re-adding accounts.

Reset All Settings (Last Resort)

If none of the above work, you can reset all settings on your iPhone. This won’t delete your data, but it will reset things like Wi-Fi passwords, wallpaper, and notification preferences. It can fix underlying system glitches that are causing the Mail app to crash.

Go to Settings > General > Reset > Reset All Settings. Your iPhone will restart. After that, you’ll need to re-enter your Wi-Fi password and reconfigure any custom settings, but your emails and accounts will remain.

Only do this if you’re comfortable with losing your personalized settings. It’s a more drastic step, but it often resolves stubborn app crashes.

Preventing Future Crashes

Once you’ve fixed the crashing, you can take steps to prevent it from happening again:

• Keep iOS updated: Apple regularly releases bug fixes. Always install the latest iOS version.
• Don’t let your mailbox get too large: If you have thousands of emails in your inbox, the Mail app has to work harder. Archive or delete old emails to keep the app responsive.
• Use the native Mail app’s search sparingly: The search index can get corrupted. If you notice search slowing down or causing crashes, restart your phone.
• Close other apps: If you’re on an older iPhone with limited RAM, closing background apps can help prevent memory pressure crashes.

These habits are especially important if you’re still on iOS 11 and can’t upgrade to a newer iOS version (e.g., on an older iPhone model).

Frequently Asked Questions

Will I lose my emails if I delete my account?

No. Deleting an account from your iPhone only removes it from the Mail app. Your emails remain on the server (e.g., Gmail, Yahoo, Outlook). When you re-add the account, all your emails will appear again.

Why does Mail crash only when I open a specific email?

This usually indicates a corrupted attachment or an email with a formatting issue that the Mail app can’t render. Try deleting that email from another device or via webmail. If you can’t, you can try clearing the Mail cache as described above.

Does upgrading to iOS 12 or later fix the crashing?

Yes, iOS 12 and later versions have significantly improved Mail stability. If your device supports a newer iOS version, upgrading is the best long-term fix. The steps above are for users who are stuck on iOS 11 for some reason.

Can a third-party email app fix this problem?

Yes. If the native Mail app keeps crashing, you can use a third-party email client like Gmail, Outlook, or Spark. They have their own interfaces and are not affected by the iOS 11 Mail bugs.

Is there a way to back up my Mail settings before resetting?

Your mail settings (account passwords, etc.) are not backed up locally. You’ll need to re-enter them after a reset. However, you can take a screenshot of your account settings (server names, ports, etc.) for reference before resetting.

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