Mail is connecting to your email service provider, but it can't connect your email account because your email provider isn't accepting your email password.
Your email provider may reject your password for several reasons, including:
- You're not using your current email password. If you updated the password on another device, make sure that you're using the same password on this device.
- Your email provider needs you to update or reset your password for security reasons. For example, if you turned on Google’s two-step verification, your Gmail account in Mail now requires the appropriate app password.
- Your email provider deactivated or suspended your account. Contact your email provider for help.