- Level
- confirmed
- Worst impact
- Degraded
- Components
- SMTP Delivery - USA, SMTP Delivery - EUROPE
- Regions
- eu, us
What to do
Check whether you use SparkPost SMTP Delivery - USA, SMTP Delivery - EUROPE 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 3h 6m it lasted.
Anything that failed between 2026-10-11 17:51 UTC and 2026-10-11 20:57 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 5
- identified
We are investigating an increase in delayed (deferred) messages in both our US and EU regions, beginning at approximately 14:40 UTC on October 11. A subset of our internal DNS resolvers are intermittently failing to resolve recipient domains, causing some delivery attempts to be temporarily deferred. Affected messages are not being dropped or bounced. Retries are succeeding as they are routed to healthy resolvers, so impacted messages are being delivered with additional latency. Customers may observe an elevated number of delay events in webhooks, event logs, and reporting during this time. We have identified the cause as a DNSSEC validation issue on a portion of our resolver fleet related to a scheduled update of the internet's root DNS signing key, and are applying a fix. No action is required from customers. We will provide an update within 60 minutes or as soon as we have more information.
provider
- identified
We are continuing to rollout the new root signing keys from ICANN. We continue to see recovery across our global clusters.
provider
- identified
We are continuing to work on a fix for this issue.
provider
- monitoring
A fix has been implemented and we are monitoring the results.
provider
- resolved
This incident has been resolved.
provider
Reports count in aggregate; nothing about you is shown.
Corrections
None so far.
Something wrong on this page? Report an error or send us a note. Every fix is listed here.
Questions about DWN-6823fe6f7b
Is SparkPost still down?
No, this incident was resolved 2026-10-11 20:57 UTC. For SparkPost's live state, see https://down.guide/sparkpost.
How long did it last?
3h 6m, from 2026-10-11 17:51 UTC to 2026-10-11 20:57 UTC, by the times SparkPost posted.
What was affected?
SparkPost named SMTP Delivery - USA, SMTP Delivery - EUROPE in eu, us.
What caused it?
SparkPost hasn't published a root cause. If it does, it shows here.
Where does this come from?
SparkPost's official status page, https://status.sparkpost.com, quoted verbatim. down.guide's own probes, reports and social counts are labeled as ours.