ChangesSparkPostPartial Outage and Delivery Issues in US-West-2 Region
SparkPost: Critical incident: Partial Outage and Delivery Issues in US-West-2 Region
Summary
Summary pending. The diff below shows exactly what changed.
Incident page: the full timeline of updates
What changed
Struck in red is what SparkPost removed; blue is what they added. Muted text is unchanged context.
Before: not present
After: Partial Outage and Delivery Issues in US-West-2 Region
Before: not present
After: critical
Before: not present
After: resolved
Before: not present
After: 2026-07-24 11:14 UTC
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After: 2026-07-24 18:44 UTC
Before: not present
After: SMTP API - SMTP API - USA, SMTP API - USA, SMTP Delivery (Outbound Message Delivery) - SMTP Delivery - USA, SMTP Delivery - USA, Transmissions API - Transmissions API - USA, Transmissions API - USA
Before: not present
After: We are investigating delivery issues caused by an ongoing AWS US West 2 region outage.
Customers may experience delays while we assess the impact to our service. We are actively monitoring the situation and will provide updates as more information becomes available.
Before: not present
After: Outbound email delivery is blocked for our US West region. We working with our vendor resolve the issue.
We are continuing to accept emails and queue them internally. We will deliver the messages as soon as the issue is resolved.
Before: not present
After: We are starting to deliver mails in our US West region. We are working through the queued messages.
We are continuing to monitor the issue and continuing to accept emails.
Before: not present
After: We are still working through the queued messages.
We are continuing to monitor the issue and continuing to accept emails.
Before: not present
After: We have implemented additional tuning to handle the significant influx of mail due to the AWS network outage and we are seeing improvement in delivery rates
We are seeing significant recovery and expect most mail to be fully delivered in the next 30-35 minutes. Estimated time for full recovery is 80-90 minutes.
We are continuing to look for additional optimizations and monitor the issue.
Before: not present
After: This incident has been resolved.
First version of this incident archived by Rewindex. View the live incident (opens in new tab).
History of this incident
Friday, July 24
1 incident change
- CriticalCritical incident
Partial Outage and Delivery Issues in US-West-2 Regionthis change