Hashtags, either love them or hate them, but they are here for the long term and they are spreading.
Recently I have started to receive a number of emails (from different people) using the Hashtags for things such as #Max to indicate the bit that I need to read in the email when its gone to multiple recipients or #Action for the things I need to do.
Typically I have always received emails with the words Max or Action in them, but the addition of the # is more recent. It certainly makes the words on the page noticed a bit more as its a character my eyes are not normally used to seeing.
There is certainly an ever decreasing line between social media and work communication etiquette.
Maybe its time to update the definition to include emails.
a word or phrase preceded by a hash sign (#), used on social media sites such as Twitter to identify messages on a specific topic.
(PS. If anyone called Bob is reading this its not really your action)