On 2/1/21 1:58 AM, Johannes Rohr wrote:
I get a batch of bounces once a month from GMail, when mailman sends out the monthly reminders.
When I look into the headers of those notifications, it looks like they miss the DKIM signature, which is super weird, because the notification about the bounce that mailman sends to the listowner has a DKIM signature. I wonder what is going wrong there. My understanding is that the signing is done by rspamd and that mailman doesn't have anything to do with it. Why aren't all messages signed?
As you note, Mailman has nothing to do with DKIM signing of outgoing mail. Your outgoing MTA does it, probably by invoking some milter. It could be rspamd or something else. You have to look at the configuration. If you are using rspamd's DKIM signing module, see <https://rspamd.com/doc/modules/dkim_signing.html>.
-- Mark Sapiro <mark@msapiro.net> The highway is for gamblers, San Francisco Bay Area, California better use your sense - B. Dylan