Just a record of changes for those of you who care about the infra:
* Updated postfix on lists to strip DKIM/ARC headers for incoming messages.
These get re-signed on the way out, and even when we have DKIM aligment to the new sig, some things don't like the old sig not verifying.
* Updated mailman to always do DMARC From mitigation
This will ensure we have DKIM alignment
This also updated several lists that were doing Wrap based mitigation to do From mitigation
* Updated SPF records
To remove unneeded rackspace IPs
* Updated our DMARC records
Added some missing fields, removed rua/ruf addresses we don't need, added rua/ruf address for mailgun.
* Updated DNS for lists.linuxfests.org
Added an MX, rather than falling back to A record
There's more to come, we need to move to enforcing our SPF/DKIM/DMARC policies, but I want to wait and make sure we're actually getting DMARC alignment first.