Actually, the recipient need only look at the header to see when the email went through the servers.Backdating refers to the procedure of dating any document to a date earlier than the application date. There is nothing about it that needs to be "decoded" in any way unless the way it’s stored isn’t in a plain text fashion (like an Outlook OST/PST file).Over time you may have had to change email addresses, and as such had to forward messages from your old address to your new one.
This information may not be displayed the same way in your mail client, however it will be in there somewhere.
If the former then you could, would be a funny project.
note- I don't recall if the spam one I got was a future one that stuck as new, or a past one that stuck as the first email. Barlop said "But the email client used the funny one." I've seen Thunderbird do just that -- display the date/time from the sender's system -- but Gmail on the web, as well as many other sites, don't use the same header field.
Backdating is mostly used to make the age of the consumer at policy issue lower than the actual age to get a lower premium.
Backdating in most circumstances is considered fraudulent and illegal. For instance, backdating a claim for a past period is taken as legal.
When he's not out globetrotting, you can find him in beautiful Austin, TX, where he lives with his partner.