Unique content in interrelated email messages is identified and duplicate content filtered out for user friendly display of a flow of exchange within the interrelated messages. Follow-on messages such as replies or forwards are compared to the original message to determine which part of a follow-on message is not present in the original message and is a unique part of the follow-on message. The comparison includes parsing of the messages to extract user viewable parts determination of which extracted part is the last message part containing unique information. Once the unique message part is determined, message body that excludes everything after the unique part including the headers is be displayed.