Event Notification Service occasionally fails to send event notifications
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Event Notification Service occasionally fails to send event notifications

Marketing Cloud API

Last updated 2021-12-08 ·Reference W-7740499 ·Reported By 3 users

In Review

Summary
Event Notification Service may intermittently fail to send event notifications due to internal host resolution issues.

Repro
1. Set up your system to receive events from the Event Notification Service (ENS):
https://developer.salesforce.com/docs/marketing/marketing-cloud/guide/ens-get-started.html#prerequisites
2. Notice that occasionally the ENS doesn't send event notifications in response to transactional send requests and bounce events

Workaround
Use the /messaging/v1/email/messages/{messageKey} endpoint if a sent or notsent event isn't received, and query _Bounce to get the bounces (since the above endpoint won't return bounce events). The CompositeID returned from the above endpoint can be used to tie sent records to bounces

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