1.10 Bouncing ============= The ‘message-bounce’ command will, if the current buffer contains a bounced mail message, pop up a message buffer stripped of the bounce information. A “bounced message” is typically a mail you’ve sent out that has been returned by some ‘mailer-daemon’ as undeliverable. Headers that match the ‘message-ignored-bounced-headers’ regexp will be removed before popping up the buffer. The default is ‘^\\(Received\\|Return-Path\\|Delivered-To\\):’.