From Halon, SMTP software for hosting providers
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Atomia has a partnership with Halon Security and through this partnership they provide their customers with a discounted price for the Halon platform. The product is delivered as a software "appliance" (bare-metal or virtual) which is then placed between the normal email cluster and the world providing services such as better spam filtering, easier manageability and improved tracing ability for system administrators.

Setting up Halon for Atomia

Follow these steps to setup the Halon system:

  1. Follow the getting started instructions
  2. During the getting started guide, choose the "transparent/dynamic" method (Halon accepts all domains accepted by destination server) and set the "destination server" to the cluster IP of your Postfix cluster setup in accordance with Atomia's normal procedure
  3. Make sure to enable “SMTP authentication”in the AUTH flow so that authenticated users (users that your normal Postfix cluster considers authenticated) can relay mail to the Internet via Halon
    • This should at least be done on the port 587 listener, but can also be done on the port 25 listener if this is preferred by the customer
    • You find this setting on the Mail > Relay table page

The only thing needed to make sure that the incoming (and users outgoing) mails gets passed through the Halon system is to make sure that the following properties of the PostfixAndDovecot resource in the resource description is set to the IP of the Halon instead of the IP of the Postfix cluster:


The other (ImapIpAddress, PopIpAddress, WebmailIpAddress) should still be set to the IP of the Dovecot cluster loadbalancer.