PostHog incident

Workflows: email sending failing in certain workflows

Resolved after 1 hour 18 minutes, affecting EU Cloud 🇪🇺 (Workflows) and US Cloud 🇺🇸 (Workflows), on August 18, 2026.

resolved Aug 18, 2026, 09:53 PM UTC

The fix is deployed and email sending is back to normal in both regions. We will reach out to affected customers about a rerun of the emails that failed during the incident.

Started
Aug 18, 2026, 08:35 PM UTC
Resolved
Aug 18, 2026, 09:53 PM UTC
Duration
1h 18m
Detected by Pingoru
Aug 18, 2026, 08:35 PM UTC

Affected components

EU Cloud 🇪🇺 (Workflows)US Cloud 🇺🇸 (Workflows)

Update timeline

  1. investigating Aug 18, 2026, 08:35 PM UTC

    We're seeing an increased email failures in certain workflows in both regions.

  2. identified Aug 18, 2026, 08:50 PM UTC

    We have identified the cause of the email sending failures affecting some workflows. A fix is in review, and we will update this page once it is rolled out.

  3. monitoring Aug 18, 2026, 09:42 PM UTC

    We have deployed a fix and are monitoring recovery. Affected workflows resume sending automatically, with no action needed. Emails that failed during the incident were not sent automatically. We are preparing a way to rerun the affected runs and will contact the affected customers directly.

  4. resolved Aug 18, 2026, 09:53 PM UTC

    The fix is deployed and email sending is back to normal in both regions. We will reach out to affected customers about a rerun of the emails that failed during the incident.

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