550 Rejected by Header Based Anti-spoofing Policy

[#1]

Issue

Email bounces with Error: 550 Rejected by header based Anti-Spoofing policy

Solution

This error can happen if:

• DKIM/SPF configuration is incomplete for the from domain in the sending email address.

https://experienceleague.adobe.com/docs/marketo/using/getting-started-with-marketo/setup/configure-p...