Campaign sending delays

What to do

• Check whether you use Klaviyo Email Sending. 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 3h 39m it lasted.

  Anything that failed between 2026-06-08 21:10 UTC and 2026-06-09 00:49 UTC may need a replay.

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

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

Updates from Klaviyo 5

1. investigatingJun 8, 2026, 9:10 PM UTC

   Some customers may be experiencing delays with campaign sending, where sends are currently stuck in processing. We are investigating the issue and will provide an update as soon as we have more information.

   provider

2. identifiedJun 8, 2026, 9:19 PM UTC

   We have identified the root cause and are working on a fix. We will share another update shortly.

   provider

3. identifiedJun 8, 2026, 11:20 PM UTC

   We are continuing to work through the fix for this issue. We are working to resolve this as quickly as possible and will share another update shortly.

   provider

4. monitoringJun 8, 2026, 11:54 PM UTC

   We have deployed a fix and campaign sending is recovering. We are processing the backlog of delayed campaigns and expect to deliver them shortly. We continue to monitor closely and appreciate your patience throughout this incident.

   provider

5. resolvedJun 9, 2026, 12:49 AM UTC

   Campaign sending has been restored and the backlog of delayed campaigns has completed sending. This incident has been resolved.

   provider

Corrections

None so far.

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