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The app likely has outdated security protocols and are disabled by default.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app - If you receive an error message like 'Server password has changed' or 'Authentication failed,' your app might be outdated. Keep the number of devices pulling from IMAP limited and current. Turns out that all the other servers were maxed out on IMAP connections, except for the one that I was able to connect to.

Outdated devices pulling from IMAP can result in an unpleasant Mail experience. We have multiplue servers that host the emails and I tried all of them until I finally got connected to one. 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.

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