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Either update the app or grant temporary access in your account settings. The app likely has outdated security protocols and are disabled by default. Update your app - If you receive an error message like "Server password has changed" or "Authentication failed," your app might be outdated. On the Yahoo Account Security page, the App Password Generator gives an error Sorry, this feature is not available right now.
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Keep the number of devices pulling from IMAP limited and current. Outlook for Microsoft 365 Last Updated: JISSUE When adding a Yahoo IMAP account to Outlook Desktop, some users find that they are unable to generate an App Password. Outdated devices pulling from IMAP can result in an unpleasant Mail experience. Let me know your thoughts when you get a chance.Ĭheck your connected devices - Make sure your connected devices are all current and still in use. This can also save your battery and data usage. Create and use an app password - This is required if you've enabled Yahoo account key or two-step verification.Ĭheck for extra email address - An unverified email address can cause a 553 error when sending from a third-party app.Ĭheck your device’s settings - Ensure your device is manually pulling from the server versus automatically. There are many different types of email accounts you can add to Outlook, including Microsoft 365, Gmail, Yahoo, iCloud, and Exchange accounts.