All Systems Operational

Uptime over the past 90 days. View historical uptime.
SparkPost Application (WebUI) Operational
90 days ago
100.0 % uptime
Today
SparkPost Application - USA Operational
90 days ago
100.0 % uptime
Today
SparkPost Application - EUROPE Operational
90 days ago
100.0 % uptime
Today
SMTP Delivery (Outbound Message Delivery) Operational
90 days ago
99.99 % uptime
Today
SMTP Delivery - USA Operational
90 days ago
99.98 % uptime
Today
SMTP Delivery - EUROPE Operational
90 days ago
100.0 % uptime
Today
Transmissions API Operational
90 days ago
100.0 % uptime
Today
Transmissions API - USA Operational
90 days ago
100.0 % uptime
Today
Transmissions API - EUROPE Operational
90 days ago
100.0 % uptime
Today
SMTP API Operational
90 days ago
100.0 % uptime
Today
SMTP API - USA Operational
90 days ago
100.0 % uptime
Today
SMTP API - EUROPE Operational
90 days ago
100.0 % uptime
Today
Metrics API Operational
90 days ago
100.0 % uptime
Today
Metrics API - USA Operational
90 days ago
100.0 % uptime
Today
Metrics API - EUROPE Operational
90 days ago
100.0 % uptime
Today
Events API Operational
90 days ago
100.0 % uptime
Today
Events API - USA Operational
90 days ago
100.0 % uptime
Today
Events API - EUROPE Operational
90 days ago
100.0 % uptime
Today
Relay Webhooks Delivery Service Operational
90 days ago
100.0 % uptime
Today
Relay Webhooks - USA Operational
90 days ago
100.0 % uptime
Today
Relay Webhooks - EUROPE Operational
90 days ago
100.0 % uptime
Today
Sending Domains API Operational
90 days ago
100.0 % uptime
Today
Sending Domains API - USA Operational
90 days ago
100.0 % uptime
Today
Sending Domains API - EUROPE Operational
90 days ago
100.0 % uptime
Today
Suppression List API Operational
90 days ago
100.0 % uptime
Today
Suppression List API - USA Operational
90 days ago
100.0 % uptime
Today
Suppression List API - EUROPE Operational
90 days ago
100.0 % uptime
Today
Event Webhook Delivery Service Operational
90 days ago
100.0 % uptime
Today
Event Webhooks - USA Operational
90 days ago
100.0 % uptime
Today
Event Webhooks - EUROPE Operational
90 days ago
100.0 % uptime
Today
Engagement Tracking Service Operational
90 days ago
100.0 % uptime
Today
Engagement Tracking Service (redirecting clicks and serving opens) - USA Operational
90 days ago
100.0 % uptime
Today
Engagement Tracking Service (redirecting clicks and serving opens) - EUROPE Operational
90 days ago
100.0 % uptime
Today
Mailbox Provider Service Interruption Operational
Blocklist API Operational
90 days ago
100.0 % uptime
Today
Blocklist API - USA Operational
90 days ago
100.0 % uptime
Today
Blocklist API - EUROPE Operational
90 days ago
100.0 % uptime
Today
Alerts API Operational
90 days ago
100.0 % uptime
Today
Alerts API - USA Operational
90 days ago
100.0 % uptime
Today
Alerts API - EUROPE Operational
90 days ago
100.0 % uptime
Today
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.

Aug 28, 2026

No incidents reported today.

Aug 27, 2026
Elevated hard bounces for Apple private relay recipients (privaterelay.appleid.com)
Resolved - The Apple bounce levels have maintained at pre incident levels during our monitoring phase. Our clean up of the bad suppressions has finished.
This incident is resolved.
Aug 27, 18:56 EDT
Monitoring - We have seen recovery of the Apple private relay domain to pre-event bounce levels. Our team is actively working on automatically removing any suppressions that were created by this event. We anticipate the cleanup to be completed by 6PM EDT.
Aug 27, 15:28 EDT
Update - We have started to see recovery of the Apple private relay domain. We will continue monitoring for the next 60 minutes to confirm full recovery. Our team is actively working on automatically removing any suppressions that were created by this event. We anticipate the cleanup to be completed between 4-6PM EDT.
Aug 27, 15:10 EDT
Update - We continue to see elevated 550 5.1.1 user not found hard bounces from Apple private relay. Once resolved on the provider's side, we will automatically remove Apple Private Relay suppression entries created by this event.
Aug 27, 14:03 EDT
Identified - Beginning 2026-08-26 around 23:00 UTC, we are observing a significant increase in hard bounces for messages sent to recipients at privaterelay.appleid.com, the relay domain used by Sign in with Apple. Affected messages are rejected by Apple's mail servers with the SMTP response 550 5.1.1 user not found.

Our investigation confirms this originates upstream at the receiving mailbox provider, not within our platform. Delivery to all other domains, including icloud.com, me.com, and mac.com, remain unaffected and are performing normally. A substantial share of the affected addresses delivered successfully as recently as 2026-08-26, indicating the rejections do not reflect genuine invalid recipients.

Impact: Because these are hard bounces, affected recipient addresses may be automatically added to your suppression list, which will prevent future sends to those recipients even after the underlying issue is resolved.

Action required: None at this time. We recommend you do not attempt to manually clean or re-import affected suppression entries while the issue is ongoing. We are working directly with Apple on a resolution. Once resolved, we will remove suppression entries created by this event and will confirm the scope and timing in a follow-up update.

We will post our next update within 4 hours or sooner if the situation changes.
Aug 27, 12:51 EDT
Aug 26, 2026

No incidents reported.

Aug 25, 2026

No incidents reported.

Aug 24, 2026

No incidents reported.

Aug 23, 2026

No incidents reported.

Aug 22, 2026

No incidents reported.

Aug 21, 2026

No incidents reported.

Aug 20, 2026

No incidents reported.

Aug 19, 2026
Outbound message delivery is delayed/slow for some SparkPost customers (EU hosted only)
Resolved - This incident has been resolved.
Aug 19, 15:58 EDT
Monitoring - A fix has been implemented and we are monitoring the results.
Aug 19, 15:44 EDT
Investigating - We are investigating an increase in delivery latency for some outbound messages. (NOTE: This does not impact our customers hosted in the US.)
Aug 19, 14:52 EDT
Aug 18, 2026

No incidents reported.

Aug 17, 2026

No incidents reported.

Aug 16, 2026

No incidents reported.

Aug 15, 2026

No incidents reported.

Aug 14, 2026

No incidents reported.

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