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iPhone Cannot Verify Server Identity? 11 Solutions to Fix It

"iPhone cannot verify server identity" is a common issue you may encounter while using the mail app. This problem can be very disturbing as it will prevent you from sending and receiving emails. However, it can be easily solved.

What does ‘Cannot Verify Server Identity’ mean?

iPhone cannot verify server identity prompt occurs when your iPhone finds that the SSL certificate of the mail server does not match its domain name. That’s to say, when the device tries to match the SSL Certificate and the server settings to test its reliability, it may be unsuccessful and display the error of ‘Cannot Verify Server Identity’.

This article discusses why your iPhone says it cannot verify server identity and what you can do to fix this problem. Let’s check it out.

iphone cannot verify server identity

Why Does My iPhone Say Cannot Verify Server Identity?

iPhone marks the server as unreliable and pops up this error. It typically occurs while adding a new email account, updating the prior mail server certificate, or migrating the email account.

Sometimes, bugs on the iOS version of the iPhone can also cause it. Whatever the reason is, you should be able to solve the issue easily in most cases.

11 Methods to Fix Cannot Verify Server Identity Issue?

If you cannot verify server identity on your iPhone, don’t worry, below are some effective solutions you can take to get rid of the problem.

1. Check the Date and Time

What we should try first is to check date and time on iPhone to ensure that information is correct. We can also set them to automatic from iPhone settings when necessary.

If there is no problem with the date and time, we can proceed and try other methods.

set automatically

2. Restart Your iPhone

If you are lucky, you might be able to get rid of the issue just by restarting your iPhone. Here is how to do it on different iPhone models:

  • For iPhone X or newer versions, keep pressing the Side button and either Volume button together until you see the power off slider.
  • For iPhone 8 or older versions, keep pressing the Top or Side button until the power off slider appears on the screen.

restart iphone

Drag the slider to power off the iPhone. Wait a while, then press and hold the Top or Side button again to turn the device back on.

3. Close and Restart the Mail App

Sometimes,  the problem can occur because of a glitch on the Mail app. In this case, restarting the app may solve the problem.

  • Swipe up from the bottom of the home screen (For older iPhones, just double-tap the Home button) to bring the app tray.
  • Find the Mail app from there and close it by swiping the app window. Open the app again after that and see if it works perfectly.

force close mail app

4. Connect to Another Network or Disable VPN

Sometimes your mail server can be blocked by the ISP, which will prevent the iPhone from verifying the server identity. Using a VPN can also cause this issue. In this case, close the VPN and try the mail using another Wi-Fi or cellular data.

5. Delete Your Email Account and Add It Back

Removing the email account and re-adding it will reset the server identity details, which may help to solve the issue. Here is how to do this:

  • Go to Settings and then Mail > Accounts.
  • Next, press on the email account you want to remove.
  • Finally, click Delete Account.

remove email account iphone

This will remove the email account. You can re-add it by going to Mail and then Add Account.

6. Reset Network Settings

Resetting your network settings means all the customized networks in the device will be removed and restored to default settings. If the error is caused by invalid settings, resetting the network setting may help. Here is how to do this:

  • Open iPhone’s Settings and go to General.
  • Scroll down to find and open the Transfer or Reset iPhone option.
  • Select the Reset Network Settings option. Enter the passcode if prompted and confirm the operation.

reset network settings iphone

7. Reset All Settings

Sometimes the settings of the apps on your iPhone can interfere and cause the issue. As it can be hard to find which app is causing the issue, you can try to reset all settings on your iPhone. Here is how to do this:

  • On your iPhone, open the Settings app and tap on General.
  • Scroll down to find the Transfer or Reset iPhone option and tap on it.
  • Choose the Reset All Settings option. Enter the phone’s passcode to confirm the reset.

reset all settings

8. Update iOS and Carrier Settings

If the issue is caused by a system bug, you might be using an outdated iOS version on your iPhone. You will need to update the iOS to the latest version to solve the issue.

First, go to Settings > General > Software Update to check if new iOS versions are available. If so, Download and Install the update.

update ios

Updating the carrier settings can also be useful if some network problems cause the error. To update carrier settings, go to Settings > General > About. Then, scroll down to find the carrier section. Complete the update if available.

update carrier settings

9. Factory Reset Your iPhone (Data Loss)

If you still cannot solve the issue, consider factory resetting your iPhone. Remember that this will remove all the data and settings stored on the device. Here is how to perform the reset:

  • Head over to Settings > General and click on Transfer or Reset iPhone.
  • Now press Erase All Content and Settings.
  • Enter the passcode and follow the on-screen guide to complete the factory reset.

erase all content and settings

10. Fix iPhone Cannot Verify Server Identity without Data Loss

Fortunately, there is a way to solve the problem and bring your iPhone to normal state without losing any data. You can use the FoneGeek iOS System Recovery tool for this. It allows you to solve more than 200 iOS system-related issues quickly and efficiently. The powerful tool is easy to use and lets you fix any iOS-related issues safely. And the best thing is there is no chance of losing your data while using it.


Let’s see how to fix iPhone cannot verify server identity without data loss:

Step 1: Download and install the FoneGeek iOS System Recovery on your Windows or Mac computer. Then, launch the program and choose "Standard Mode" on the homepage.

choose repair mode

Step 2: Now plug your iPhone to the computer with a USB cable. If your device is in the normal state and running iOS 12 or later, unlock the phone and press "Next."

connect ios device

If the device is not detected by the software, boot it into the DFU or Recovery mode by following the on-screen guide.

put iphone into recovery mode

Step 3: You will now notice the available iOS versions and your iPhone model in the app interface. Select the preferred version of the Firmware and press "Download."

download firmware

Step 4: Wait until the FoneGeek program downloads and verifies the iOS firmware. After that, press "Fix Now" to begin solving the issue. Within a while, your iPhone will restart. That's it; the problem should be solved now if a system error causes it.

fix now

11. Contact Email Service Provider or Apple Support

Actually, none of the above solutions will work if the problem is with your email service provider. Such as, they can be under maintenance or going through some other technical difficulties. In these cases, you will need to connect with the service provider to understand the situation.

You may also request them to take care of the issue and reconfigure the email server. You can also consider reaching out to Apple Support to report the issue. This might be helpful if the issue is with the Apple server.

The Bottom Line

There you have it, 10 different fixes to solve the iPhone cannot verify server identity. We hope you will be able to get rid of the issue following the solutions we outlined above.

If you are sure that a system error is causing the issue, don't waste your time trying all the methods. Instead, make use of the FoneGeek iOS System Recovery software to fix the problem easily and quickly.

Edwin J. Parke

As a professional writer who is interested in technology, Edwin J. Parke has helped thousands of users by offering various tips to solve their problems.

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