I have used the same email address on Yahoo since I got a computer 20 years ago. I use Yahoo Mail and IE 11. Enable Account Key to access your account more securely using your smartphone. I dont understand. I have highlighted all the ones I don't want but nothing comes up to delete them, I have even right clicked and there is no delete option in this menu either. Account Key boosts security by sending a prompt to your mobile phone instead of using a password. This doesnt ALWAYS happen, just certain sites. Explore this guide to fix any issues that may come up. I typed in the To Box the name and the drop down gave the correct and several wrong/obsolete addresses for that name. If I sign up for any service and enter my email address, I get a response that my email account is invalid. An elegant and secure HTTPS-based RESTful API , which uses JSON as its primary data interchange format. You can follow the question or vote as helpful, but you cannot reply to this thread. I've tried erasing and re-entering my gmail email a million times. Now there seems to be an authentication issue that Yahoo has changed and I can no longer use that email address for a lot of things it is either rejected is invalid or I can't send emails to other people from my Yahoo address. Share Share Tweet Email When I have sent email to anyone from my Yahoo Mail, their addresse automatically registers in my contacts file, but there is no delete icon to remove them. Some users have found that entering the full email address as the description fixes the problem. When I switch Wi-fi to BT, this message, and the failure to send, are avoided. I believe Yahoo is assuming that because I still have some saved mail from the old, now invalid, addresses, that I need to keep those old addresses listed under the appropriate Contacts. Keep bad data from ever entering your system by rejecting invalid addresses in real-time! After it populates, if you hover over the address you get another box which has the name e-mail, space for pictures, a search option and in lower left three dots. This thread is locked. why do website not recognize my email address valid When I try to order online, or register, websites come back with "please enter a valid email address", which I do many times, but no result. I have been getting the message “sender address invalid” from AppleMail. But when they want to create a backup of Yahoo emails they need a third party application and without a third-party application, you cannot download Yahoo emails into PC. So for some reason, if a website asks me to type in my email address, whether it be for purchasing an item or applying for a job, it always says that the email address I entered is invalid or not in the right format. But I DON’T want the old addresses saved under the Contacts’ information, even when I want to save old e-mails from those addresses in my account. Set up, use, and manage Yahoo Account Key to sign in without a password. Set up, use, and manage Yahoo Account Key to sign in without a password 1 decade ago why is my email account invalid? Click on the correct address. Fix issues with Yahoo Account Key. Yahoo Mail Application is mainly used for sending and receiving emails but many users use it for storing contacts, scheduling meetings and managing calendars. "[AUTHENTICATIONFAILED] AUTHENTICATE Invalid credentials" It may be due to a new security feature in Yahoo that disables access from what they call "less secure apps". It does not mean Mailbird is not secure - we connect using full encryption - it's just what Yahoo calls it when a non-Yahoo application connects using a username and password. Open the Settings app on your iPhone or iPad. Primary data interchange format “ sender address invalid ” from AppleMail I typed in the Box... May come up is my email account invalid to BT, this,! 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