Klaviyo experienced a minor incident on June 8, 2026 affecting Email Sending and SMS Sending - Toll Free Number SMS and 1 more component, lasting 3h 39m. The incident has been resolved; the full update timeline is below.
Affected components
Update timeline
- investigating Jun 08, 2026, 09:10 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.
- identified Jun 08, 2026, 09:19 PM UTC
We have identified the root cause and are working on a fix. We will share another update shortly.
- identified Jun 08, 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.
- monitoring Jun 08, 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.
- resolved Jun 09, 2026, 12:49 AM UTC
Campaign sending has been restored and the backlog of delayed campaigns has completed sending. This incident has been resolved.