If you’ve an account on Yahoo Mail and want an uninterrupted service of the email platform, ensure that the Yahoo Mail SMTP and Yahoo Mail POP server settings are configured properly. Any mistake in these settings can stop you from ensuring a smooth Yahoo Mail experience. Besides, you must ensure that you have a strong and reliable internet connection, failing which, you can’t access Yahoo Mail or run any other online service.
You can check out these instructions mentioned here to resolve the Yahoo IMAP not working 2021 issue.
To solve this, verify you're using the right POP or IMAP settings.
You can check to see if the app is configured correctly with the IMAP settings for Yahoo Mail.
If the settings are configured correctly, the date on the hard drive saved in the Yahoo account could have been corrupt.
You can delete the account from the application and then re-add it.
yahoo mail pop and smtp settings for outlook
Customers are looking to know about the solution of Yahoo mail not working on the iPhone need to follow some basic steps or dial - +18077704082 these toll-free numbers to talk Yahoo customer representatives easily.1.
On your iPhone, tap on Settings > Passwords & Accounts.2.
Tap on your Yahoo mail account.3.
Choose Delete Account in Red font and confirm.4.
This removes the existing yahoo account from your iPhone, but you still have access to all your emails on the yahoo server.