Microsoft Authentication-Results don't have identifier

[deepcover96]

It looks like Microsoft Authentication-Results don't have an identifier:
spf=pass (sender IP is 209.85.222.48); smtp.mailfrom=valimail.com; dkim=pass (signature was verified); header.d=valimail.com;dmarc=pass action=none; header.from=valimail.com;compauth=pass reason=100

Microsoft Authentication Results:
https://www.valimail.com/blog/understanding-email-authentication-headers/
and
https://learn.microsoft.com/en-us/defender-office-365/message-headers-eop-mdo#authentication-results-message-header
Someone here is attempting to report the lack of identifier to Microsoft:
https://answers.microsoft.com/en-us/outlook_com/forum/all/authentication-results-header-written-by-outlook/890b304c-3c81-48b6-b065-36fad3b551e4

When calling authres.Parse(results) with these results, you'll receive the error: "msgauth: unsupported version"

go-msgauth/authres/parse.go

Line 232 in e466bf2

return "", nil, errors.New("msgauth: unsupported version")

[emersion]

Specifically, authserv-id from the RFC grammar is missing.