Re: Using the company mail server
A true BOFH would have filed the email under the names of the two people involved. Just in case, sometime in the future, one of them happened to be in a position to do him a "favour".
Given the sense of humour here and the fact that it's Friday I would have expected the "blackmail both" choice to top the poll. So yay for upstanding citizenship (pardon the contextual pun :) ), booh for not staying true to BOFH principles :).
(and yes, I would have deleted it too - we're still human).