A fix has been implemented and we are monitoring the results.
Posted Oct 14, 2021 - 10:16 EDT
We are experiencing an elevated level of SMTP errors for some SparkPost and SparkPost Enterprise 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 Oct 14, 2021 - 09:58 EDT
This incident affected: SMTP API (SMTP API - USA).