- Check recipients email address
 - Ensure that you entered an accurate & valid email address that includes the domain, such as john@example.com
 - Check the email filter settings
 - The recipient might have an email filter that blocks emails. Check if your emails are being routed to the spam or junk mail folder.
 - Check you anti-virus program
 - Make sure that your anti-virus program isn’t blocking the message you are trying to send.
 
