You can check the status of any incoming and outgoing mail from your account, including the reasons for any mail that has been rejected.
First, log in to your control panel.
From the 'Email' section, select 'Track Delivery':
The default list will show all failed mail - both incoming and outgoing. You can switch to all email using the 'Show All' button or filter it down to a specific recipient by the full email address and clicking the blue 'Run Report' button.
The Delivery Report section shows the emails sent and received and allows you to filter by email status using tick boxes.
By clicking the list icon in the top right-hand corner, you can add or remove columns to get to the information you need.
