The goal of ARC is to improve deliverability of mail that passes through
intermediary administrative domains, which given DKIM, DMARC, and SPF
policies, might otherwise be quarantined, rejected, or silently dropped.
Common examples of Intermediaries are mailing lists, alumni or professional
email address providers like universities or professional organizations,
et cetera.
If Fedora Infrastructure, as a forwarding and mailing list service, wishes
to implement ARC
http://arc-spec.org/ on the mailing list and alias
forwarding servers, I have an OpenARC package review request open:
https://bugzilla.redhat.com/show_bug.cgi?id=1615162
Thanks,
Matt