I over-thought this and taught my spam filter about signed email addresses. https://kevincox.ca/2022/07/07/signed-email-addresses/ https://kevincox.ca/2022/07/

I over-thought this and taught my spam filter about signed email addresses. https://kevincox.ca/2022/07/07/signed-email-addresses/ https://kevincox.ca/2022/07/07/signed-email-addresses/ Basically signed addresses are exempt from regular spam filtering. If they are abused they are blocked.