[This is a repeat of the archived #500966] On Mon, Aug 31, 2020 at 07:30:13PM -0400, Alexander Tait Brotman wrote: > lists.debian.org should use DKIM as part of taking ownership of its > messages. This allows mailbox providers to be reasonably sure that > messages signed by the systems can be attributed to lists.debian.org, > and perhaps assist with domain reputation. This may also help with > forwarding as ARC gains traction as well. This should not have any > major impact on performance, nor on deliverability.
I don't think DKIM will help much. But it would really, really help if lists.debian.org could do ARC so that providers can a) do reputation or b) just trust that domain to get it right. Yes, there have been some changes to invalidate DKIM signatures less, but you cannot control what the incoming DKIM signature encompassed. So I found a mail recently where there were various headers included that lists.debian.org modifies by design. ARC solves this problem by just letting you sign the outgoing emails, regardless of prior DKIM status. Kind regards Philipp Kern
