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Courier

Slack Deliverability Issues

Degraded Lasted 10m · started · Courier's page

Level
confirmed
Worst impact
Degraded
Down Index
13of 100

What to do

  • Check whether your product depends on Courier. 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 10m it lasted.

    Anything that failed between 2026-05-27 23:06 UTC and 2026-05-27 23:16 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 2

  1. monitoring

    Slack has reported messaging, and app degredation on their platform that could be impacting deliverability of Slack messages. This is a downstream provider issue and can be monitored on Slack's statuspage: https://slack-status.com/

    provider

  2. resolved

    Please continue to monitor Slack's statuspage for any updates related to message deliverability: https://slack-status.com/

    provider

Reports count in aggregate; nothing about you is shown.

Corrections

None so far.

Something wrong on this page? Report an error or send us a note. Every fix is listed here.

Questions about DWN-28449dd8d6

Is Courier still down?

No, this incident was resolved 2026-05-27 23:16 UTC. For Courier's live state, see https://down.guide/courier.

How long did it last?

10m, from 2026-05-27 23:06 UTC to 2026-05-27 23:16 UTC, by the times Courier posted.

What caused it?

Courier hasn't published a root cause. If it does, it shows here.

Where does this come from?

Courier's official status page, https://status.courier.com, quoted verbatim. down.guide's own probes, reports and social counts are labeled as ours.