Hello asparks,
Your email has arrived ;-)
(Recently, when I received my own answer, I thought that SPF, DKIM, DMARC mails to the distribution list could get stuck somewhere?)
I would also be interested in the answer, since you may have to delete all administrative data (flags in some cyrus.xxx-files) and run a reconstruct? Haven't had the case yet, but then don't want to set a wrong option...
Ciao,
Martin