R. David Murray added the comment: If you use smtplib.send_message in python3, it will do what you want (including stripping BCC headers before sending the message). If someone wants to create a PR to add an example of what Eric is talking about (specifying additional senders in smtplib.sendmail to match what is in the CC headers) please open a new issue with a PR (which may or may not get accepted :). I don't think it is worth doing, myself, but I won't object if others think it enhances the docs. ---------- _______________________________________ Python tracker <report@bugs.python.org> <http://bugs.python.org/issue29771> _______________________________________