GMAIL Notice from MAIB sent email: "Why is this message in Spam? It has a from address in but has failed's required tests for authentication."


Any ideas how I fix this?


Try and see what it says. It will also help you fix issues.


Also, are you absolutely sure that MiaB sent that mail? It’s common for programs to try to send mail on your behalf.


I know this is a bit old but this error most likely indicates a SPF policy failure, probably a soft fail on the sender SMTP IP for the sending main domain.

Hope this helps.