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

Resolved

Minor impact

Started

Lasted 1h 35m

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Updates

  1. Resolved

    This incident impacted a limited batch of messages injected via SMTP API. We have quarantined the impacted the node and working on delivering the messages and isolating the root cause. The SMTP API is full operational

  2. Identified

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

  3. Investigating

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