I do believe this email was routed via the Bermuda Triangle
It's most probably wrong time&date set on the outbound exchange server.
This message was sent on 19th Jun 2008 at 15:26:44, following which it travelled at the speed of light to our server. It then waited until 23rd Aug 2011 at 10:32:47 when it was collected by Agent 94 aka 'Eha' who finally forwarded it to you on 23rd Aug 2011 at 23:45:28.
If you would like to reply by Real Snail Mail™ please visit realsnailmail.net here you can also find a photo of Eha.
Great Scott!