La función de un cortafuegos no es bloquear el correo electrónico no deseado. Para eso necesitas un antispam.
https://www.ironportstore.com/Anti-Spam.asp
I am not a Cisco Meraki employee. My suggestions are based on documentation of Meraki best practices and day-to-day experience.
Please, if this post was useful, leave your kudos and mark it as solved.
