On Sat, 2017-07-08 at 15:33 -0700, Junio C Hamano wrote: > That is how a message that is BCC'ed to you is supposed to look > like, isn't it? May be not. rfc5322 (Internet Message Format) seems to clear the confusion, There are three ways in which the "Bcc:" field is used. In the first case, when a message containing a "Bcc:" field is prepared to be sent, the "Bcc:" line is removed even though all of the recipients (including those specified in the "Bcc:" field) are sent a copy of the message. In the second case, recipients specified in the "To:" and "Cc:" lines each are sent a copy of the message with the "Bcc:" line removed as above, but the recipients on the "Bcc:" line get a separate copy of the message containing a "Bcc:" line. Until recently, I have only witnessed the second case as a result of which I was confused. :) -- Kaartic