---
schema_version: "1"
id: 5ad9ef8627e809e7a17812006f6872ae1f4eec1b109a9c21fb0c456e47d0a5a6
title: Avoid Duplicate Email Sends in Journey Builder
collection: admin
version: current
locale: en-us
portal_url: https://docs.salesforce.com/admin/current/en-us/release-notes/264-0-0/rn_mce_journeys_duplicate_sends.md
canonical_url: https://help.salesforce.com/s/articleView?id=release-notes.rn_mce_journeys_duplicate_sends.htm&release=264.0.0&type=5
source_site: help.salesforce.com
content_type: documentation
content_hash: 150b04ac12a04b93b0675bd65594bcf7f6f34d810749f1728a67290e8f48bb6a
description: Prevent unnecessary sends by deduplicating email addresses in journeys. If your entry source data extension contains multiple contact keys with the same email address, deduplication ensures that each recipient receives only one copy of the email from each email activity in a journey within the specified lookback period.
products:
  - Cross Cloud
release: "264"
---
# Avoid Duplicate Email Sends in Journey Builder

Prevent unnecessary sends by deduplicating email addresses in journeys. If your entry source data extension contains multiple contact keys with the same email address, deduplication ensures that each recipient receives only one copy of the email from each email activity in a journey within the specified lookback period.

**Where:** These changes apply to Marketing Cloud Engagement editions.

**How:** On the Settings page for a journey, under Journey Deduplication Configuration, turn on **Enable Email Deduplication**.