---
schema_version: "1"
id: 166e97c08c6b92c91548d939663ce63bb27cba42a5d098ab6776cdfaa2f8f04a
title: Improve Event Notification Service (ENS) Reliability
collection: admin
version: current
locale: en-us
portal_url: https://docs.salesforce.com/admin/current/en-us/release-notes/260-0-0/rn_mce_parent_ens.md
canonical_url: https://help.salesforce.com/s/articleView?id=release-notes.rn_mce_parent_ens.htm&release=260&type=5
source_site: help.salesforce.com
content_type: documentation
content_hash: 7f64984b78cdd90d39dedf7ab08bca2aeacdc7f28fad5d028111cf1418f7278e
description: The new 7-day retry window prevents users from experiencing dropped batches due to unsuccessful delivery attempts. When a batch of notification events fails to deliver, ENS retries delivery at periodic, decreasing intervals for up to 7 days. After that, retries stop and delivery fails. Previously, ENS suspended callback URLs immediately after a failed delivery.
products:
  - Cross Cloud Packages Solutions
release: "260"
---
# Improve Event Notification Service (ENS) Reliability

The new 7-day retry window prevents users from experiencing dropped batches due to unsuccessful delivery attempts. When a batch of notification events fails to deliver, ENS retries delivery at periodic, decreasing intervals for up to 7 days. After that, retries stop and delivery fails. Previously, ENS suspended callback URLs immediately after a failed delivery.

**Where:** This change applies to all Marketing Cloud Engagement editions.

SEE ALSO | _Developer Guide_: [Retries and Callback Suspensions](https://developer.salesforce.com/docs/marketing/marketing-cloud/guide/ens-retries-suspensions.html)