Tester Day
On September 9, 1947 scientists from Harvard University were testing one of the first computing machines, the Mark II Aiken Relay Calculator, at their Computation Laboratory. During one of these tests they found a moth inside the machine which had become stuck in one of it's relays. They were obligated to record this incident and came up with a proper word on the spot to describe their measures for removing the moth - debugging, literally meaning 'to get rid of a bug'. Ever since that incident this term has been used to describe the process of identifying and removing bugs from computers, and subsequently a completely new profession arose to meet this task - the tester.
As it turns out Google Apps infrastructure has a BUG that is causing emails delay. The only available suggestions is to set up spf record. But this is not going to solve it .