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]
iPhone 14 Pro Max, iOS 18
"Authentication Failure for Mail on iPhone: 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."
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Fixing your Credentials:
A. Use a New App Password:
Note that you may need a new App Password, being that Mail is a third party app. You cannot log in using your eMail address password. As an example, you'd go here for gmail: Sign in Using App Passwords - Gmail Help - Google Support
No success?...
B. Add the Account Back:
I've seen quite a few relevant report on this since iOS18 and Sequoia, in regards to Outlook/Hotmail accounts in the Mail app. The solution for that is to remove the eMail account, and then add it back, using the exchange option.
I changed my Apple password, and got the authentication failure. It fixed itself after I synced the phone with a lightning cable.
I have yahoo mail on my home hp computer and I need to know how to sync with my AT&T iphone 15
Power iPhone off. Wait 10sec then power back on. Open MAIL app and emails should start to download.
When I go to use my email, I get a message that says server code authentication failed server message, authenticate, invalid, credentials
Can’t use new mail icon to access ail. Need to go to aol icon
Where is the slider
canot get e-maile
Me too
I cannot get my emails. It says authentic verification failure.
Could someone please explain to me how to get into my email with authentication failure? How do you fix this?
I cannot get mail on my iPhone. It says "Authenticationfailed". Why?
thank you Queen Bee, this fixed my problem.
Authentication Failure for Mail on iPhone
