Mail security isn't set up correctly for your domain '{0}', and it's causing mail flow issues. To fix it, you need to authorize ...

Mail security isn't set up correctly for your domain '{0}', and it's causing mail flow issues. To fix it, you need to authorize Office 365 to send mail from your domain. You can do this by updating your SPF record at your DNS host provider. Don't worry, we have a solution that walks you step by step through the process. Click the link 'Get help fixing this issue' in the actions pane on the right side of the screen to get started.