Not adding ARC headers when no Authentication-Results?

[Jered Floyd <jered@xxxxxxxxxxxxx>]

Greetings, 

I have OpenARC successfully signing and sealing messages as part of my ADMD outgoing mail flow, which includes both indirect flow and locally generated (i.e. DMARC-aligned) mail. Indirect flow has an Authentication-Results header applied on ingress, noting spf/dkim/dmarc/arc status, while locally generated mail does not have such a header. OpenARC applies an AAR header with "none" to locally generated mail currently. 

I'd like to add an option to OpenARC to not sign/seal messages that have no Authentication-Results header; it is unnecessary work (it's essentially meaningless), and I am concerned that the empty AAR may confuse outside reputation systems. 

Would the dev team be amenable to such a patch? Or is there a way to do this today that I've missed? 

Thanks, 
--Jered