# Enable primary DLP Gateway mail flow rule in Exchange On premise

## Introduction

This page covers the activation of the primary mail flow rule for DLP Gateway in Exchange On premise, which will be responsible for routing selected email traffic to Zivver.

## Getting started

1. Go to the Exchange Administrative Center (EAC).
2. Log into EAC as an administrator.
3. Click on **Mail flow** in the menu on the left.
4. Click on **Rules**.

## Enable the primary mail flow rule

1. Select the checkbox in front of `Zivver: Outbound DLP` in the overview on the **Rules** page.

The mail flow rule is now enabled. Every outbound message that satisfies the configured conditions will be relayed to the Zivver SMTP Server.

Updated on 2025-08-15