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

Incident Report for SparkPost

Resolved

09/12/2020: From 13:15 UTC through 13:35 UTC, we experienced 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 Sep 12, 2020 - 09:00 EDT