If you're are logged into the Primary Site URL and are using Outlook 2013, please see the information below.
By default, Microsoft Outlook 2013 is configured to block pictures that are links within a message that download pictures from an internet location. Because of local security settings these pictures will not be available to download on the the email message in the header
Please contact your email exchange server administrator to update the security and trust settings for Outlook 2013.
Note: We provide links to third-party websites in an effort to help you resolve your issue. We are not responsible for the information on third-party websites and we cannot assist with implementing resolutions from these websites.