All Systems Operational

Uptime over the past 90 days. View historical uptime.
SparkPost Application (WebUI) Operational
SparkPost Application - USA Operational
SparkPost Application - EUROPE Operational
SMTP Delivery (Outbound Message Delivery) Operational
SMTP Delivery - USA Operational
SMTP Delivery - EUROPE Operational
Transmissions API Operational
Transmissions API - USA Operational
Transmissions API - EUROPE Operational
SMTP API Operational
SMTP API - USA Operational
SMTP API - EUROPE Operational
Metrics API Operational
Metrics API - USA Operational
Metrics API - EUROPE Operational
Events API Operational
Events API - USA Operational
Events API - EUROPE Operational
Relay Webhooks Delivery Service Operational
Relay Webhooks - USA Operational
Relay Webhooks - EUROPE Operational
Sending Domains API Operational
Sending Domains API - USA Operational
Sending Domains API - EUROPE Operational
Suppression List API Operational
Suppression List API - USA Operational
Suppression List API - EUROPE Operational
Event Webhook Delivery Service Operational
Event Webhooks - USA Operational
Event Webhooks - EUROPE Operational
Engagement Tracking Service Operational
Engagement Tracking Service (redirecting clicks and serving opens) - USA Operational
Engagement Tracking Service (redirecting clicks and serving opens) - EUROPE Operational
Mailbox Provider Service Interruption Operational
Blocklist API Operational
Blocklist API - USA Operational
Blocklist API - EUROPE Operational
Alerts API Operational
Alerts API - USA Operational
Alerts API - EUROPE Operational
Operational
Degraded Performance
Partial Outage
Major Outage
Maintenance
Major outage
Partial outage
No downtime recorded on this day.
No data exists for this day.
had a major outage.
had a partial outage.

No incidents or maintenance related to this downtime.

Oct 11, 2026

Increased message delays in US and EU due to DNS resolution errors
Resolved - This incident has been resolved.
Oct 11, 16:57 EDT
Monitoring - A fix has been implemented and we are monitoring the results.
Oct 11, 14:17 EDT
Update - We are continuing to work on a fix for this issue.
Oct 11, 14:17 EDT
Update - We are continuing to rollout the new root signing keys from ICANN. We continue to see recovery across our global clusters.
Oct 11, 14:09 EDT
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.
Oct 11, 13:51 EDT

Oct 10, 2026

No incidents reported.

Oct 9, 2026

No incidents reported.

Oct 8, 2026

No incidents reported.

Oct 7, 2026

No incidents reported.

Oct 6, 2026

No incidents reported.

Oct 5, 2026

No incidents reported.

Oct 4, 2026

No incidents reported.

Oct 3, 2026

No incidents reported.

Oct 2, 2026

No incidents reported.

Oct 1, 2026

Mail delivery delays
Resolved - This issue has been resolved. Since our changes went in, we've seen no further delivery delays, including through peak sending periods. Email is being delivered normally. We apologize for the disruption and thank you for your patience.
Oct 1, 13:36 EDT
Monitoring - We've made changes to address the intermittent delivery delays. Since then, email has been delivered without delay, including during peak sending periods that previously caused the slowdowns. We're watching closely to confirm the issue is fully resolved and will post an update here. Thank you for your patience.
Oct 1, 13:16 EDT
Investigating - Some email deliveries are being delayed. The delays come and go, and queued messages are being delivered once each one clears. Our team is investigating the cause and working on a fix. We'll post an update here as soon as we know more. We apologize for the disruption.
Oct 1, 13:05 EDT

Sep 30, 2026

No incidents reported.

Sep 29, 2026

No incidents reported.

Sep 28, 2026

No incidents reported.

Sep 27, 2026

No incidents reported.

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