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

Incident Report for SparkPost

Resolved

This incident has been resolved.

Posted Oct 28, 2026 - 16:37 EDT

A fix was implemented and we are seeing sustained delivery recovery.

Posted Oct 28, 2026 - 16:37 EDT

We are continuing to work on a fix for this issue.

Posted Oct 28, 2026 - 16:03 EDT

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

Posted Oct 28, 2026 - 16:00 EDT

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

Posted Oct 28, 2026 - 15:48 EDT

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

Posted Oct 28, 2026 - 15:37 EDT

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