Outbound message delivery is delayed/slow for some SparkPost customers (US hosted only)

Update timeline

1. investigating Feb 18, 2026, 02:51 PM UTC

   We are investigating an increase in delivery latency for some outbound messages. (NOTE: This does not impact our customers hosted in the EU.)

2. identified Feb 18, 2026, 03:02 PM UTC

   The issue has been identified and a fix is being implemented.

3. identified Feb 18, 2026, 03:15 PM UTC

   We have begun to see improvements to outbound mail delivery delays. We anticipate full recovery in the next 30 minutes.

4. monitoring Feb 18, 2026, 03:59 PM UTC

   We continue to see strong recovery of the mail queues and message delivery. We expect all remaining delayed messages to be delivered in the next 5 minutes.

5. monitoring Feb 18, 2026, 04:15 PM UTC

   We have seen recovery. We will continue monitoring for the next 60 minutes to ensure message queues stay stable.

6. resolved Feb 18, 2026, 05:06 PM UTC

   This incident has been resolved.