Outage in SparkPost
Increased bounce or delay rate for Apple domains
Resolved MinorIncident Report
Summary AI Generated
SparkPost experienced increased bounce rates and delivery delays for emails sent to Apple-hosted domains due to an Apple iCloud Mail outage, while messages to non-Apple domains remained unaffected. The incident affected SMTP delivery services in both USA and Europe regions for 2 hours. The issue was resolved when Apple fixed their iCloud Mail outage, and SparkPost performed cleanup of suppression lists to remove any recipients that were incorrectly suppressed during the incident.
We are currently investigating reports of delayed or failed email deliveries to Apple-hosted domains. Messages to non-Apple domains are unaffected. We will provide updates as more information becomes available.
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Latest Updates ( sorted recent to last )
RESOLVED
30 minutes ago - at 04/05/2026 07:01PM
Delivery rates to Apple domains have returned to normal with no further elevated delays or bounces. We will perform any necessary post-incident cleanup of suppression lists to ensure no recipients were incorrectly suppressed during the outage.
MONITORING
about 1 hour ago - at 04/05/2026 06:27PM
A fix has been implemented and we are monitoring the results.
IDENTIFIED
about 2 hours ago - at 04/05/2026 05:58PM
The issue was caused by an Apple iCloud Mail outage (https://www.apple.com/support/systemstatus/), which Apple has since marked as resolved. Bounce rates and delivery delays to Apple domains have returned to normal levels. We are currently reviewing our suppression lists to identify and remove any recipients that may have been incorrectly added during the incident.
INVESTIGATING
about 2 hours ago - at 04/05/2026 05:02PM
We are currently investigating reports of delayed or failed email deliveries to Apple-hosted domains. Messages to non-Apple domains are unaffected. We will provide updates as more information becomes available.
Latest SparkPost outages
Email delivery in US region affected - 25 days ago
Outbound message delivery is delayed/slow for some SparkPost customers (US and EU regions) - about 1 month ago
Microsoft Mail Delivery Delays and Temporary Rejections - about 1 month ago
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