Recovered email?

What would cause the loss of the message in a recovered email that's been in 'Delete' folder for one week. All that remains is the sender, senders address , recipient (me) the usual warning at bottom of emails . Message Gone!!!!.. (.hotmail account ). Just curious fortunate not important.

Thank you*
*It seems the days have gone when people showed their appretiation by using those two words. Like the lady on a bus, I got up to offer my seat. Response was 'I should think so too. ' I sat down leaving her to stand to enjoyment of other passengers who were supprised at her response..