Participants in our research on Email and Business Applications were asked to describe their most valuable email and the cost to the business if that message had not arrived.
Sent bid response to customer via email, per their instruction. Ours got caught in their spam filter and did not get the bid on time. It was awarded to our competitor and even though the customer acknowledged the problem with the filter, they could not reverse their decision. We were priced $250K lower than the winning bid, soe in actuality, that email cost both sides $1,250,000.
Related Report: The Problem with Email