On 23/03/2020 8:55 am, Viktor Dukhovni wrote:
It is best to not modify the message headers at all, which iseffectively what the Postfix list does (it adds a Sender: header which should not be covered by the upstream DKIM signature).
I know the Sender header has traditionally been used by mailing lists, but would the Resent-Sender from rfc5322 be better in case people send to the postfix mailing list with a DKIM signature for an existing Sender header
