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

Incident Report for SparkPost

Identified

We have identified the issue and are working on a resolution; delivery latencies are recovering.

Posted Oct 30, 2026 - 16:02 EDT

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

Posted Oct 30, 2026 - 15:21 EDT

This incident affects: SMTP Delivery (Outbound Message Delivery) (SMTP Delivery - USA).