Elevated error rates for some SparkPost customers injecting via SMTP in the US region.

Incident Report for SparkPost

Resolved

This incident has been resolved.
Posted Jun 28, 2023 - 12:39 EDT

Monitoring

A fix has been implemented and we are monitoring the results.
Posted Jun 28, 2023 - 11:41 EDT

Investigating

We are experiencing an elevated level of SMTP errors for some SparkPost customers injecting using SMTP. Please retry any 4xx errors.

Note: This issue does not impact our customers hosted in the EU.
Note: Outbound message delivery is not impacted.
Posted Jun 28, 2023 - 11:17 EDT
This incident affected: SMTP API (SMTP API - USA).