I am getting spam emails repeatedly from the domain of a particular organization. How can I blacklist this domain?

I am getting spam emails repeatedly from the domain of a particular organization. How can I blacklist this domain?

Follow these steps to blacklist the sender domain of an organization:

  • Login to your Zoho Mail account as the administrator.
  • Go to Control Panel > Mail Administration > Spam Control > Blacklist.
  • Select the email delivery option as Reject email and add this domain to the list of blacklisted domains.