Calendar-Server.Bounces.Google.Com Spf. I would rather get to the bottom of this, though, e.g. How to get google calendar invites to pass dmarc.

Messages sent from servers not in your spf record can fail authentication. How to get google calendar invites to pass dmarc.
I Would Rather Get To The Bottom Of This, Though, E.g.
Why do they end up in spam in the first.
In Some Instances A Bounce May Be.
Having said that, google calendar invitation replies by default are sent with envelope from a google domain.
Get A List Of All Ip Addresses And Domains In Your Spf Record With The Google Admin Toolbox.
Images References :
When I Diagnosed, I Found Out The Emails From The Calendar Or Forms Are Generated From The Google Server, And That Is Why They Are Getting Blocked.
Get a list of all ip addresses and domains in your spf record with the google admin toolbox.
Seems To Have Fixed The Spf Bounces According To The Today Filter In Dmarc Analyzer.
Header domain is outlook.com, while the spf and dkim identifier belong to the organizational domain google.com.
This Will Help You Bypass Rejection Even If You Use A Google Server To Respond To.