Platform Deployment Guide › Quarantine Manager › Pre-deployment Considerations › Emails Detected At Network Boundary May Not Be Quarantined

Emails Detected At Network Boundary May Not Be Quarantined

Under certain conditions, a ‘quarantine' action applied by the NBA or Milter MTA agent may only affect external recipients; internal recipients may already have received the email. In general, this problem only affects emails sent to both internal and external recipients. It is also depends on how your CA DataMinder server agents and user policies are configured.

Because the NBA and the Milter MTA agent capture emails at the network boundary, an email may already have been received by some internal recipients before it is detected by the NBA or Milter MTA agent. This happens if the email was routed directly to these recipients by Exchange or Domino without passing through the NBA or a Sendmail or Postfix server. As a result, if the NBA or Milter MTA agent then quarantines the email, the email is only withheld from external recipients pending its release. Any internal recipients may already have received the email.

Note: The Milter MTA agent is hosted on Sendmail or Postfix servers, which are typically located on the boundary of your corporate network.