My father periodically locks himself out of his account and I have to help him regain access. I want to keep using the same password, which he has memorized, but Yahoo won't let me. Instead, every time he fat fingers his password and accidentally sets a new one that he also fat fingers and has no memory of what he set, I have to create yet another one and update all of his e-mail clients on his laptops and hope we don't repeat the cycle the first time his cell phone tells him he has to enter his (new) password in order to access his e-mail there. No one is hacking his e-mail. The user should be the judge of whether a password change is because of a security issue vs because of a senility issue.

Please stop bombarding me with security checks. You have made email, which is supposed to be convenient, a miserable and laborious endeavor. Today I wanted to check my email, but OH NO, i used a new device. So first I have to log into a different email to enter a 4 letter security code, which of course doesn't work, three times with three different codes. Then I get locked out and have to use a different device. This time the code works but it tells me that I have to update my password. Then I have to connect a phone. Finally I get to see my email a full twenty minutes after I started.

I will never use your service again.

When traveling abroad, I used my brother's computer to access Yahoo Mail like I've always done for years, and this time it wanted to send me a security code to my telephone. Problem is, it cost me $5 in roaming. And what if I had no access to my phone? Dead battery, no network, left phone elsewhere, etc,, many issues can prevent us from having access to our phone at a precise moment. Yahoo says that another option is a secondary email address..., but aside from the fact that that other provider could request the same, why should I be periodically monitoring another email (lest it gets closed) just for this purpose?
Yahoo Customer Service refused to consider changing this mandatory feature and to send my concern to a higher authority. For those of us who depend on our Yahoo email, this is a critical concern. I need access to my email. While I appreciate Yahoo watching over our security, such a feature should be OPTIONAL.
I now want to change providers after 15 years.