SparkPost Outage History
SparkPost is up right nowPingoru has recorded 51 incidents for SparkPost: 38 in the last 12 months and 6 in the last 90 days.
Show as a table
| Month | Incidents | Hours with an open incident |
|---|---|---|
| April 2026 | 1 | 2 of 720 (0%) |
| May 2026 | 4 | 29 of 744 (4%) |
| June 2026 | 1 | 1 of 720 (0%) |
| July 2026 | 1 | 8 of 744 (1%) |
| August 2026 | 2 | 7 of 744 (1%) |
| September 2026 | 2 | 3 of 720 (0%) |
| October 2026 | 2 | 4 of 583 (1%) |
Incidents, newest first
Minor December 5, 2025 Data processing delays for SparkPost customers - US and EU regions 3h 6m Metrics API - USA, SparkPost Application - USA, SparkPost Application - EUROPE, Metrics API - EUROPE
Started Dec 05, 2025, 07:16 PM UTC· resolved Dec 05, 2025, 10:23 PM UTC
- investigating Dec 05, 2025, 07:16 PM UTC
Our data processing services are running behind; some customers may see a delay of data available via the: - SparkPost App (webUI): Signals Reports - Events API - Metrics API Message injection and outbound message delivery are not impacted - all messages are flowing as expected.
- identified Dec 05, 2025, 08:24 PM UTC
The issue has been identified and a fix is being implemented.
- identified Dec 05, 2025, 09:43 PM UTC
Metrics API is fully caught up. We are continuing work to restore full data availability in the UI.
- resolved Dec 05, 2025, 10:23 PM UTC
The incident has been resolved.
Minor November 28, 2025 Yahoo Mail Sending Delays 37m Events API - USA, SparkPost Application - USA, Event Webhooks - USA
Started Nov 28, 2025, 09:40 AM UTC· resolved Nov 28, 2025, 10:17 AM UTC
- investigating Nov 28, 2025, 09:40 AM UTC
We are currently experiencing delays in email delivery to Yahoo recipients. Our monitoring systems have detected increased queue times for messages destined for Yahoo domains (yahoo.com, ymail.com, etc.). Current Status: Email delivery to Yahoo is experiencing delays This appears to be a receiving issue on Yahoo's infrastructure Our sending systems are operating normally All other ISPs and providers are unaffected Impact: Messages to Yahoo recipients are being queued and will be delayed No messages are being lost or dropped Our systems will continue automatically retrying delivery per our normal retry schedule
- identified Nov 28, 2025, 09:53 AM UTC
We have confirmed this is an issue with Yahoo's receiving infrastructure. Yahoo's mail servers continue to return temporary failure codes that are preventing normal mail delivery. Current Status: The issue has been confirmed to be on Yahoo's side Our sending infrastructure is operating normally All queued messages will be delivered automatically once Yahoo resolves their infrastructure issues No customer action is required Error Messages You May See: If you're monitoring your delivery logs, you may see the following (non-inclusive) temporary failure messages from Yahoo: 451 4.4.2 [internal] no BODY response 451 4.4.2 [internal] connection closed by remote host 451 4.4.2 [internal] no MAIL FROM response 451 4.4.2 [internal] no RCPT TO response 421 Service not available, closing transmission channel tnmpmscs These are all temporary errors from Yahoo's infrastructure. Messages receiving these errors are being automatically retried and will be delivered once Yahoo resolves the issue. We are continuing to monitor the situation and will provide updates as Yahoo works to resolve this on their end.
- monitoring Nov 28, 2025, 09:54 AM UTC
We are seeing signs of recovery. Yahoo's mail servers are beginning to accept messages normally and delivery rates are improving. Current Status: Yahoo appears to be resolving their infrastructure issues Delivery success rates are increasing Queued messages are being processed and delivered We continue to monitor closely to ensure full recovery What to Expect: Messages that were queued during the incident are being delivered as Yahoo's systems recover You may see a temporary spike in delivery volume as the backlog clears Delivery times should return to normal as the queue processes We will continue to monitor the situation closely and will post a final update once we confirm full recovery.
- resolved Nov 28, 2025, 10:17 AM UTC
This incident has been resolved.
Minor November 27, 2025 High response times on the API 1h 37m Transmissions API - USA
Started Nov 27, 2025, 11:24 AM UTC· resolved Nov 27, 2025, 01:01 PM UTC
- investigating Nov 27, 2025, 11:24 AM UTC
We are currently investigating this issue.
- investigating Nov 27, 2025, 12:26 PM UTC
We are continuing to investigate this issue.
- resolved Nov 27, 2025, 01:01 PM UTC
This incident was resolved.
Notice November 21, 2025 Intermittent email api failures impacting EU customers 1h 22m Transmissions API - EUROPE
Started Nov 21, 2025, 09:08 AM UTC· resolved Nov 21, 2025, 10:30 AM UTC
- investigating Nov 21, 2025, 09:08 AM UTC
We are currently investigating this issue.
- investigating Nov 21, 2025, 09:49 AM UTC
A mitigation was deployed and the error rate is subsiding
- investigating Nov 21, 2025, 10:17 AM UTC
We have identified the issue and deployed a mitigation; all service functionality has been completely restored.
- investigating Nov 21, 2025, 10:30 AM UTC
We are continuing to investigate this issue.
- resolved Nov 21, 2025, 10:30 AM UTC
This incident has been resolved.
Minor November 20, 2025 Webhook delays for some SparkPost customers (US hosted only) 2h 27m Event Webhooks - USA
Started Nov 20, 2025, 03:56 PM UTC· resolved Nov 20, 2025, 06:23 PM UTC
- investigating Nov 20, 2025, 03:56 PM UTC
Our webhook data delivery services are running behind and some customers may see a delay in data streamed to their webhook endpoints. Message injection and outbound message delivery is not impacted - all messages are flowing as expected. Note: This issue does not impact our SparkPost customers hosted in the EU.
- identified Nov 20, 2025, 04:12 PM UTC
The issue has been identified and a fix is being implemented.
- monitoring Nov 20, 2025, 05:16 PM UTC
A fix has been implemented and we are monitoring the results.
- resolved Nov 20, 2025, 10:09 PM UTC
This issue has been resolved. We apologize for any inconvenience it may have cause.
Minor November 11, 2025 SMTP message delivery is delayed/slow for some SparkPost customers (US hosted only) 1h 35m SMTP Delivery - USA
Started Nov 11, 2025, 02:35 PM UTC· resolved Nov 11, 2025, 04:10 PM UTC
- investigating Nov 11, 2025, 02:51 PM UTC
We are investigating an increase in delivery latency for some outbound messages. (NOTE: This does not impact our customers hosted in the EU.)
- identified Nov 11, 2025, 03:01 PM UTC
The issue has been identified and a fix is being implemented.
- resolved Nov 11, 2025, 04:10 PM UTC
This incident impacted a limited batch of messages injected via SMTP API. We have quarantined the impacted the node and working on delivering the messages and isolating the root cause. The SMTP API is full operational
Minor October 28, 2025 Outbound message delivery is slightly delayed/slow for some SparkPost customers (US hosted only) 1h 53m SMTP Delivery - USA
Started Oct 28, 2025, 06:51 PM UTC· resolved Oct 28, 2025, 08:45 PM UTC
- investigating Oct 28, 2025, 06:51 PM UTC
We are investigating an slight increase in delivery latency for some outbound messages. (NOTE: This does not impact our customers hosted in the EU.)
- monitoring Oct 28, 2025, 08:11 PM UTC
A fix has been implemented and we are monitoring the results.
- resolved Oct 28, 2025, 08:45 PM UTC
This incident has been resolved.
Minor October 20, 2025 Transmissions API - Elevated error rate in US region 1h 13m Transmissions API - USA
Started Oct 20, 2025, 10:55 AM UTC· resolved Oct 20, 2025, 12:09 PM UTC
- investigating Oct 20, 2025, 10:55 AM UTC
We are currently investigating an increased error rate in the Transmissions API in the US region. A small percentage of customers may experience disruptions. Our team is actively working to identify the root cause and resolve the issue.
- resolved Oct 20, 2025, 12:09 PM UTC
This incident has been resolved.
Notice October 13, 2025 Captcha error for login with password 3h 14m SparkPost Application - USA, SparkPost Application - EUROPE
Started Oct 13, 2025, 08:28 AM UTC· resolved Oct 13, 2025, 11:42 AM UTC
- investigating Oct 13, 2025, 08:28 AM UTC
We are investigating a login issue via Email address and Password resulting in a Captcha error
- resolved Oct 13, 2025, 11:42 AM UTC
This incident has been resolved.
Minor July 24, 2025 Outbound message delivery to Yahoo is delayed/slow 3h 38m SMTP Delivery - USA
Started Jul 24, 2025, 05:41 PM UTC· resolved Jul 24, 2025, 09:20 PM UTC
- investigating Jul 24, 2025, 05:41 PM UTC
We are actively investigating a rise in delivery latency for outbound messages to Yahoo. Our current assessment indicates the issue may lie with Yahoo, and we are continuing to monitor the situation.
- monitoring Jul 24, 2025, 08:38 PM UTC
The delays have cleared up, as Yahoo appears to have resolved the issue. We will continue to monitor the situation.
- resolved Jul 24, 2025, 09:20 PM UTC
The delays have cleared up and we are no longer seeing delays for Yahoo.
Minor May 16, 2025 Relay Webhook delays in EU 24m Relay Webhooks - EUROPE
Started May 16, 2025, 03:53 PM UTC· resolved May 16, 2025, 04:18 PM UTC
- monitoring May 16, 2025, 03:53 PM UTC
A fix has been implemented and we are monitoring the results.
- resolved May 16, 2025, 04:18 PM UTC
This incident has been resolved.
Minor May 13, 2025 Elevated percentage of API calls failing 6h 7m Metrics API - USA, Transmissions API - USA, Events API - USA, SMTP API - USA and 12 more
Started May 13, 2025, 05:22 AM UTC· resolved May 13, 2025, 11:29 AM UTC
- investigating May 13, 2025, 05:22 AM UTC
We are investigating an unexpected but small increase in the percentage of API calls failing since 01:30UTC. Approximately 0.015% of API calls are failing with a HTTP 504 (Gateway timeout) error. We will update this incident as we have more information.
- investigating May 13, 2025, 05:52 AM UTC
We are still investigating. During the period, the error rate has remained low as initially reported, approximately ~0.015%.
- identified May 13, 2025, 06:26 AM UTC
We have identified the cause as a set of stale IPs for an upstream service. We are now validating the approach for remediation.
- resolved May 13, 2025, 11:29 AM UTC
After a period of extended monitoring, we have confirmed the remediation has completely resolved the issue. Requests and error rates have been normal since 06:27UTC
Notice March 28, 2025 Delay Processing Delays for March 26th 7h 12m Events API - USA, SparkPost Application - USA, SparkPost Application - EUROPE, Events API - EUROPE
Started Mar 28, 2025, 04:03 PM UTC· resolved Mar 28, 2025, 11:15 PM UTC
- identified Mar 28, 2025, 04:03 PM UTC
We identified an issue that caused historical data generation for March 26th to fail. A reprocessing job is currently underway. No data has been lost, and data is gradually becoming available in both the platform and API. We expect full availability within the next 1-2 hours. We’ll provide an update once processing is complete. Message injection and outbound message delivery are not impacted - all messages are flowing as expected.
- resolved Mar 28, 2025, 11:15 PM UTC
This incident has been resolved.
Notice January 15, 2025 Elevated error rates for some SparkPost customers injecting via SMTP in the US region. 17m SMTP API - USA
Started Jan 15, 2025, 12:27 PM UTC· resolved Jan 15, 2025, 12:44 PM UTC
- investigating Jan 15, 2025, 12:27 PM UTC
We are experiencing an elevated level of SMTP errors for some SparkPost customers injecting using SMTP. Please retry any 4xx errors. Note: This issue does not impact our customers hosted in the EU. Note: Outbound message delivery is not impacted.
- identified Jan 15, 2025, 12:29 PM UTC
The issue has been identified and a fix is being implemented.
- identified Jan 15, 2025, 12:31 PM UTC
We are continuing to work on a fix for this issue.
- monitoring Jan 15, 2025, 12:35 PM UTC
A fix has been implemented and we are monitoring the results.
- resolved Jan 15, 2025, 12:44 PM UTC
This incident has been resolved.