Why won’t the email password work?

Elldabee Said:

"Why won’t the email password work?: A week and a half ago, my husband’s email quit updating on his iPhone and his iPad. It kept telling him to enter his password. I changed it numerous times, checked the settings, called at&t support and nothing worked."

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Use an App Password:

If your husband is unable to log in to his eMail account, it is likely because he needs to use an App Password, as his normal password will not work. As an example, here is the site for gmail: Sign in with App Passwords - Google Account Help - Google

Elldabee wrote:

AT&T manages the email account for prodigy.net.

Wow, we’re talking OLD when referring to prodigy.net.

For starters, I found this in Wikipedia’s writeup about prodigy.

Then when following the trail to SBC and Yahoo, it seems the trail ended roughly in 2017.

I strongly suggest starting over with a new email service provider.

I sense some confusing mixing of facts here.

Elldabee wrote:

I … called at&t support and nothing worked.

Why might you have involved AT&T here? Because they’re your husband’s cellular carrier? That would be the wrong reason to involve them.

What matters most, and what you haven’t told us, is the identity of your husband’s email service provider.

I believe that is not AT&T.

Elldabee Said:

"Why won’t the email password work?: Maybe it’s the secure email key with AT&Y[...]“

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About AT&T Passwords for Mail:

Though an iPhone, this might be the link to use: Setup or update AT&T eMail - Apple Mail (OS X) - AT&T