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

What to do

• Check whether you use SparkPost SMTP Delivery - USA in eu, us. Check your stack

  Paste a package.json, lockfile, Terraform or a list of domains at down.guide/stack to see every provider you depend on.

• Confirm your retries, queues and scheduled jobs caught up after the 2h 16m it lasted.

  Anything that failed between 2026-02-18 14:51 UTC and 2026-02-18 17:06 UTC may need a replay.

• Subscribe to SparkPost's feed to hear about the next one first. RSS feed

  https://down.guide/feed?provider=sparkpost works in Slack (/feed subscribe), Discord feed bots and any RSS reader.

Updates from SparkPost 6

1. investigatingFeb 18, 2026, 2:51 PM UTC

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

   provider

2. identifiedFeb 18, 2026, 3:02 PM UTC

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

   provider

3. identifiedFeb 18, 2026, 3:15 PM UTC

   We have begun to see improvements to outbound mail delivery delays. We anticipate full recovery in the next 30 minutes.

   provider

4. monitoringFeb 18, 2026, 3:59 PM UTC

   We continue to see strong recovery of the mail queues and message delivery. We expect all remaining delayed messages to be delivered in the next 5 minutes.

   provider

5. monitoringFeb 18, 2026, 4:15 PM UTC

   We have seen recovery. We will continue monitoring for the next 60 minutes to ensure message queues stay stable.

   provider

6. resolvedFeb 18, 2026, 5:06 PM UTC

   This incident has been resolved.

   provider

Corrections

None so far.

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