Message Delays on Send Pipeline

What to do

• Check whether you use Courier API. Check your stack

  Paste a package.json, lockfile, Terraform or a list of domains at down.guide/stack to see every provider you depend on.

• Confirm your retries, queues and scheduled jobs caught up after the 1h 17m it lasted.

  Anything that failed between 2025-06-05 18:51 UTC and 2025-06-05 20:08 UTC may need a replay.

• Subscribe to Courier's feed to hear about the next one first. RSS feed

  https://down.guide/feed?provider=courier works in Slack (/feed subscribe), Discord feed bots and any RSS reader.

Updates from Courier 5

1. investigatingJun 5, 2025, 6:51 PM UTC

   The Courier team has identified an issue where there are significant delays of up to 10 minutes for messages. We are currently investigating and looking for a root cause to mitigate. Updates will follow.

   provider

2. identifiedJun 5, 2025, 7:04 PM UTC

   Backed-up messages were caused by a bottleneck in our system, which has started to catch up. Messages will stabilize as the bottleneck clears.

   provider

3. monitoringJun 5, 2025, 7:14 PM UTC

   Message bottleneck has cleared and the queue has stabilized. We will continue to monitor.

   provider

4. monitoringJun 5, 2025, 7:19 PM UTC

   Messages have stabilized but we will continue to monitor.

   provider

5. resolvedJun 5, 2025, 8:08 PM UTC

   Messages have recovered and pipeline is stable again.

   provider

Corrections

None so far.

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