If you can‘t send an email with iOS 11 and an Outlook.com or Exchange mail account

You might not be able to send email with an , , or account until you to .

If your email account is hosted by on Outlook.com or 365, or an Exchange 016 on Server 016, you might see this error message when you try to send an email with 11: 20;Cannot Send Mail. The message was rejected by the server.21;

To fix the , update to iOS 11.0.1 or later.