Authentication Failure for Mail on iPhone

okay i figured it out! go into mail app and into the account that’s not working. tap the mail slider to off position. wait a second or two and then flip it back on; it will prompt you to log in and whalah! mine had been off for almost two weeks and i couldn’t figure it out. turns out its an intuitive fix—hope you’ve all can find resolve!

okay i figured it out! go into mail app and into the account that’s not working. tap the mail slider to off position. wait a second or two and then flip it back on; it will prompt you to log in and whalah! mine had been off for almost two weeks and i couldn’t figure it out. turns out its an intuitive fix—hope you’ve all can find resolve!

Turning the phone off worked for me as I’d done all the other things suggested but until I turned the phone off and on, it wasn’t working. Thank you. Something so simple and effective.

Try re-starting your phone. This along with what you did resolved my problem.

I had the exact experience and rebooted and the problem was fixed.

rhodafromtempleton wrote:

When I go into mail, I am getting an error message. Authenticationfailure.

Authenticate invalid credentials.

I’m not aware of changing anything. It Worked yesterday.

I’ve tried to find an answer on the internet with no success. Can someone please help me fix my email? Thank you.

[Re-Titled by Moderator]

Yes, your email provider can fix your issue, contact them.

Here is the fix!

Go to i phone settings> Scroll down & click on apps> Scroll down & click on Mail app> Click on Mail accounts> Click the Mail account your error is referring to> switch the mail slider to off then back on. It will then prompt you to sign in, once signed in it should be fixed. If error is till occurring, once again make sure the mail slider is turned on.

Power iPhone off. Wait 10sec then power back on. Open MAIL app and emails should start to download.

I changed my Apple password, and got the authentication failure. It fixed itself after I synced the phone with a lightning cable.

Well, if nothing is working for you then I would delete the app and reinstall it.

Can’t use new mail icon to access ail. Need to go to aol icon

What did Yahoo support say when you reported the problem to them?

Your phone isn't rejecting your credentials, yahoo's servers are.

aswatkins wrote:

yahoo mail failed to authenticate - Apple Community

Yup still a Yahoo issue not Apples.

Check and be sure that you have not inadvertently entered into a private browsing mode while using safari. I assume this mode scrambles your ip addresses… or something to that effect.

You might also Check and be sure that you have not inadvertently entered into a private browsing mode while using safari. I assume this mode scrambles your ip addresses… or something to that effect.