Please consider following sequence. I send mail to the list with
It is correctly signed at my.domain.com using Sender:,
but afterwards their mailing list overwrites Sender: to looks like:
I got "bad signature data" when mail is returned, which is right, but strange and confusing syslog message and header field from dkim-filter:
Why "header.Sender" there is email@example.com instead of firstname.lastname@example.org? What happens, if I'll have, by chance list-owner as my local user, i.e. valid email@example.com?
BTW, just a question. Is there any way to get mail to the list signed using some other header field besides From: and Sender: ?