The meaning of Spam in dream | Dream interpretation
Dreams of spam signify a lack of boundaries and that you are being inundated with energy that you don’t want from people that you don’t enjoy.
If this is the case, then your dream is giving you permission to set clear boundaries with people in your life.
If you dream of being the one sending the spam, then this could be a message for you to reestablish integrity in your communication and be more respectful of other people’s boundaries. See Pop Ups.