SparkPost incident

Elevated 5xx Suppression List API error rates and latency for some SparkPost customers (US hosted only)

Minor Resolved View vendor source →

SparkPost experienced a minor incident on May 11, 2026 affecting Suppression List API - USA, lasting 1h 7m. The incident has been resolved; the full update timeline is below.

Started
May 11, 2026, 06:55 PM UTC
Resolved
May 11, 2026, 08:02 PM UTC
Duration
1h 7m
Detected by Pingoru
May 11, 2026, 06:55 PM UTC

Affected components

Suppression List API - USA

Update timeline

  1. identified May 11, 2026, 06:55 PM UTC

    We are experiencing an elevated level of errors and latency on the Suppression List API for some SparkPost customers. Please retry any 5xx error. Note: This issue does not impact SparkPost customers hosted in the EU.

  2. monitoring May 11, 2026, 07:46 PM UTC

    A fix has been implemented and we are monitoring the results.

  3. resolved May 11, 2026, 08:02 PM UTC

    This incident has been resolved.