I sent a campaign out.  My dkim and spf are authenticated according to the domain verification on settings page of zoho.
However, my own zoho email account which is a subscriber warned me this was a spoofed email.

Protonmail (test account) also said it was not verified.
Gmail didn't mind.

This is for americanmonk.org and my own account.
Perhaps it was related to a move to Cloud Flare?

However, the email server settings for that do not change.

Here are some pics first is showing domain is fine.  Then there is zoho.mail.com showing my own email is not right.  The last is protonmail also complaining.