Google Workspace user forwarding email out of non Google Workspace domain

Set up the gsuite integration.


Create a signal when Google Workspace detects a user setting up mail forwarding to a non-Google Workspace domain.


Monitor Google Workspace logs to detect when email_forwarding_out_of_domain events.

Triage and response

  1. Determine if the email address defined in @event.parameters.email_forwarding_destination_address is legitimate.
  2. If the forwarding destination address is not legitimate, review all activity for {{}} and all activity around the following IP: {{@network.client.ip}}.