Companies / Klaviyo / incidents

Klaviyo: Campaign sending delays

Affected components: SMS Sending - SMS Sending - Toll Free Number SMSSMS Sending - SMS Sending - Short Code SMSSMS Sending - SMS Sending - Toll Free Number MMSSMS Sending - SMS Sending - Short Code MMSEmail SendingEmail Sending - Campaign Email Sending

Timeline of updates

1. investigating2026-06-08 21:10 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.

2. identified2026-06-08 21:19 UTC

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

3. identified2026-06-08 23:20 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.

4. monitoring2026-06-08 23:54 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.

5. resolved2026-06-09 00:49 UTC

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

Impact, status and times are the vendor’s own, as last archived. View on stspg.io (opens in new tab). Klaviyo profile · Recent Klaviyo incidents · Markdown · JSON