How to fix ‘Account not authenticated’ iPhone email error

Updating iOS to its latest version (as of the time of writing, that would be iOS 15.2) isn’t only good practice for security reasons, but it makes sure iOS has up-to-date code and features to deal with current applications.

Go to Settings > General > Software Update to see if there’s an iOS update waiting for you.

No joy? Let’s continue to the next step.

We know how clever you are, but making a mistake when copying down information is something everyone can be guilty of.

Make sure to check with your Email service of the relevant company representative that your details are correct.

Instead of letting Mail automatically grab your Email client details, try entering them manually, so you know the server information is correct.

Normally, this isn’t an issue, but if a server has had issues or if you’ve recently updated the iOS or Mail app, a password or port setting may have gone astray.

Your email provider will have settings for any mail client on their website, with hosts and businesses having this information to hand should you need it.

Go to Settings > Mail > Accounts and select the email account you need to check. If all the details are correct and populated, tap advanced to check details are all correct there.

If your details are correct, there might be a problem with the Mail app registering the correct details with the relevant email server. Don’t worry, let’s just delete the details and try again, a fresh start is often all that is needed.

• Go to Settings > Mail > Accounts and select the email account that’s giving you trouble.
• Tap ‘Delete account’ then ‘Delete from My iPhone’.
• Then, back in the Accounts menu, select ‘Add Account’, and follow the on-screen instructions.

Don’t worry, we’re not telling you to give up, but restarting an app or device can dump any temporary files clogging up processes and resolve issues.

• From your iPhone or iPad screen, swipe up from the bottom of the screen and keep your finger on the screen until the app switcher appears.
• Find the Mail app and swipe up on it to close it. 

Are you still having issues?

• Let’s restart your iPhone/iPad to see if that fixes things.
• Hold the volume rocker and power button until the power slider shows up.
• Swipe it and turn your device off, then feel free to power your iPhone/iPad back on.

If you’re still left in the dark trying to learn how to fix ‘Account not authenticated’ iPhone email error, the chances are it’s an issue with your email service itself.

Make sure to either get in touch with their customer support or get in touch with your business contact to report the issue, and hopefully get a solution.