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

Incident Report for SparkPost

Resolved

This incident has been resolved.
Posted Nov 04, 2025 - 16:36 EST

Identified

We are investigating an increase in delivery latency for some outbound messages. (NOTE: This does not impact our customers hosted in the EU.)
Posted Nov 04, 2025 - 16:33 EST
This incident affected: SMTP Delivery (Outbound Message Delivery) (SMTP Delivery - USA).