Hi all, This is offtopic in regards to postfix but I bring it up because of the last few emails I've sent to the postfix mailing list.
I was originally signing all the headers mentioned in rfc6376 section 5.4, whether they existed or not and mails to postfix mailing list failed because of the added List-* headers. I fixed that up so that it will only sign those headers when they exist. I now oversign only the From, Sender, Reply-to, Subject, Date, Message-id, To, CC, MIME-Version, Content-Type, Content- Transfer-Encoding, Content-ID, Content-Description, Content-Disposition, In- Reply-To and References. This is still leading to the postfix mailing list failing DKIM once it's added a Sender header for owner-postfix-us...@postfix.org. Should I stop oversigning the Sender header? rfc5322 says the Sender header is unique if it exists so if there was a sender header would the postfix maling list strip it and add it's own? Should majordomo at russian-caravan be adding a Resent-From or Resent- Sender instead of Sender in order to prevent breaking the DKIM signatures for final recipients of people who include a signed Sender header? Your thoughts and opinions on this would be welcomed.
