Hi, we do understand your concern and we are here to help, make your experience with Zoho Mail, better. We are constantly working towards making our Spam Filter validate and deliver emails, as our customers prefer and we pride ourselves that the progress has so far been upward and steady. Having said that, we would like to get to the bottom of your concern and assist you with suggestions from the various Spam Control options we have or even come up with a better logic to address it. Hence, we request you to write to us at support<at>zohomail<dot>com with elaborate details about the issue. We will definitely have it analysed and sorted at the earliest. Thanks and Regards - Zoho Mail Team