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Outage in Courier

Send Pipeline Latency

Resolved Minor
June 18, 2026 - Started about 1 month ago - Lasted about 2 hours
Official incident page

Incident Report

Summary AI Generated

A regression in Courier's send pipeline caused messages to become stuck in a queued state for approximately 2 hours, affecting the API. The root cause was not the most recent deployment, though no messages were dropped during the incident. The issue was resolved by fixing the pipeline, after which all enqueued messages were processed and sending resumed normally.

The team has identified a regression causing send requests to be stuck in a queued state. We have initiated a rollback to quickly resolve the issue. More updates to follow
Components affected
Courier API

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Latest Updates ( sorted recent to last )
RESOLVED about 1 month ago - at 06/18/2026 10:09PM

Send pipeline has resolved and enqueued messages are now sending properly.

MONITORING about 1 month ago - at 06/18/2026 09:53PM

Messages are being processed while our pipeline continues to process enqueued messages.

IDENTIFIED about 1 month ago - at 06/18/2026 09:31PM

The team has identified that the most recent deployment was not the cause of the regression. The team is still working on identifying the root cause. Messages will not be dropped, and they will be processed once the fix is out.

IDENTIFIED about 1 month ago - at 06/18/2026 08:35PM

The rollback deploy will land in about 30 minutes.

IDENTIFIED about 1 month ago - at 06/18/2026 08:11PM

The team has identified a regression causing send requests to be stuck in a queued state. We have initiated a rollback to quickly resolve the issue. More updates to follow

Latest Courier outages

All services impacted - 9 months ago

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