I wonder if this is a record for the longest time taken to bounce an undeliverable email?

The email was sent by the Anagram Genius Server. (The email version that sent this is now housed at crosswordtools.com).

It was sent on the 26th of February 1997 01:20 UTC and bounced back by Yahoo as undeliverable on the 16th of June 2005 04:32 UTC. i.e More than EIGHT YEARS after it was sent!

Continue reading