ESP IntegrationsManagement InterfaceList VerificationVerification API
identified
Die Probleme wurden identifiziert und wir arbeiten an einem Fix
identified
Wir arbeiten weiter an einer Lösung für dieses Problem.
resolved
Dieser Vorfall wurde behoben.
Automatisch aus der offiziellen Störungsmeldung übersetzt.
List Upload Degredation
Beginn 19. Januar 2026 um 15:17 UTC · 0m
Pending
Betroffene Komponenten
List Verification
resolved
This incident has been resolved.
Web Application and Batch API Interruption
Beginn 16. Januar 2026 um 02:13 UTC · 2h 10m
OutageKritischer Vorfall
Betroffene Komponenten
WebsiteVerification API
investigating
Currently investigating issue with web application and batch API.
identified
The issue has been identified and a fix is being implemented.
identified
We are continuing to work on a fix for this issue.
monitoring
A fix has been implemented and we are monitoring the results.
resolved
This incident has been resolved.
Service Degradation - List Downloads
Beginn 21. August 2025 um 19:30 UTC · 2h 32m
Pending
Betroffene Komponenten
List Verification
investigating
Currently investigating issue.
investigating
We are still investigating an intermittent issue with list downloads.
resolved
Incident resolved. Monitoring will take place for a time to ensure functionality.
Verification result inconsistencies following Yahoo/AOL update
Beginn 2. Juni 2025 um 14:42 UTC · 22h 35m
IssuesGeringfügiger Vorfall
Betroffene Komponenten
List VerificationVerification API
identified
We are actively addressing an issue causing inconsistencies in the verification results for Yahoo and AOL emails. This problem has been traced to a breaking change in a recent update from Yahoo/AOL that affects our results.
We have identified the issue and we are working towards a resolution.
monitoring
A fix has been implemented and we are monitoring the results.
resolved
This incident has been resolved.
EU ONLY - System Outage
Beginn 21. Februar 2025 um 12:24 UTC · 49m
OutageKritischer Vorfall
Betroffene Komponenten
DocumentationESP IntegrationsWebsiteManagement InterfaceList VerificationVerification API
investigating
Currently investigating an issue that is causing an outage on our EU instances.
investigating
We are continuing to investigate this issue.
resolved
This incident has been resolved.
Partial Outage for Account Sign-in and some API
Beginn 17. November 2024 um 10:54 UTC · 1d 6h
IssuesGeringfügiger Vorfall
Betroffene Komponenten
WebsiteVerification API
investigating
Issue currently under investigation.
monitoring
Fix implemented and results being monitored.
resolved
Incident resolved.
API Service Degradation
Beginn 24. Oktober 2024 um 15:25 UTC · 5d 1h
IssuesGeringfügiger Vorfall
Betroffene Komponenten
Verification API
investigating
We are currently investigating and issue causing slower than normal API responses for a fraction of requests
identified
Issue identified.
Preparing deployment for fix.
monitoring
A fix has been deployed. We are now monitoring services.
resolved
This incident has been resolved.
Partial API Outage
Beginn 14. September 2024 um 23:37 UTC · 29m
OutageSchwerwiegender Vorfall
Betroffene Komponenten
ESP IntegrationsManagement InterfaceList VerificationVerification API
investigating
Partial outage. Investigating
investigating
We are continuing to investigate this issue.
resolved
This incident has been resolved.
Minor Service Degradation
Beginn 21. August 2024 um 19:30 UTC · 0m
IssuesGeringfügiger Vorfall
resolved
Team is investigating the cause of a minor service degradation occurring between 2:30pm and 3:00pm (central time).
Details to come.
postmortem
# August 21, 2024 Service Degradation Investigation
**Date**: 08/21/2024
**Status**: Mitigated
### Summary
A service degradation was detected by our monitoring services between 12:34 PST and 12:48 PST. We removed the impacted servers from rotation restoring full-service. We investigated and solved the issue before bringing the impacted servers back into production rotation.
### Impact
API service degradation in 45-second bursts for a 12 minute period, beginning at 12:34 PST causing some requests to respond with a 502 ‘Bad Gateway’. The issue was limited to a small subset of our production servers, so fewer than 3% of global API requests during this time were affected.
### Root Cause\(s\)
During a routine canary upstream service update, a small number of canary servers became unable to connect to an upstream internal service. Due to this problem, a fraction of requests to these servers caused a connection timeout, resulting in 502 Bad Gateway errors from our proxies.This problem was sporadic, so the proxies did not automatically remove these servers from rotation.
### Resolution
Our internal monitoring systems detected this degradation and we worked to manually remove these servers from production rotation. This restored the API to full health.
After our investigation, we resolved the communication issues with a full code re-deploy and service restart. We then ran a full suite of API health checks, confirmed the problem was resolved, and re-added the servers into production.
### Action Items
We will perform a review of our internal monitoring systems to decrease the time to alert, and review our proxy health-check endpoints to see if they can be improved for partial service degradation.
## Timeline
ESP Integrations
Beginn 11. März 2024 um 20:23 UTC · 92d 16h
IssuesGeringfügiger Vorfall
Betroffene Komponenten
ESP Integrations
identified
We’re currently experiencing reduced performance with several of our integrations, including Iterable, HubSpot, and Klaviyo within Kickbox, specifically affecting functionality; our team is actively working to resolve these issues to restore full service. Users can still actively leverage our email verification services through list verification or API. If you have any additional questions, please reach out to [email protected].
resolved
This incident has been resolved.
Partial API Outage
Beginn 5. März 2024 um 16:30 UTC · 0m
IssuesGeringfügiger Vorfall
resolved
A 7 minute unexpected partial outage occurred. Root cause still under investigation.
EU Verification Outage
Beginn 5. März 2024 um 15:08 UTC · 56m
Pending
Betroffene Komponenten
List VerificationVerification API
investigating
We are currently investigating an issue with the EU verification instance
investigating
We are continuing to investigate this issue.
monitoring
A fix has been implemented and we are monitoring the results.
resolved
A networking error caused a severed connection to the EU verification engine. Manual reconnection has restored services.
Web App Sign-in
Beginn 21. Januar 2024 um 06:00 UTC · 0m
Pending
resolved
A DNS change with an Amazon service temporarily broke sign-in for some users Sunday morning (API unaffected.
Unplanned Outage - API and WebApp
Beginn 8. Januar 2024 um 16:30 UTC · 0m
OutageKritischer Vorfall
resolved
There was a small outage 10 minute outage due to an unforeseen network issue during a routine deployment.
postmortem
A minor configuration change \(adding an alias to a Redis instance\) caused an unexpected error and prevented the Kickbox app from restarting after deployment. The issue was quickly detected and resolved by the engineering team. The total outage was 11 minutes.
The misconfiguration was identified quickly and a rollback tag was deployed to restore service within minutes.
Degraded service - api and app
Beginn 22. September 2023 um 13:04 UTC · 1h 37m
Pending
Betroffene Komponenten
ESP IntegrationsManagement InterfaceList VerificationVerification API
investigating
We're investigating a period of degraded service beginning at 5:54AM CST and lasting until 7:30AM CST.
resolved
We had degraded service due to a partial datastore service degradation. We repaired and restarted the datastore. No data was lost.
Partial Service Outage for some EU users
Beginn 20. September 2023 um 20:22 UTC · 0m
Pending
resolved
An issue with a upstream service provider created a window of unplanned downtime for a small fraction of EU users (smaller than 1%). The partial service outage lasted from 3pm September 19th until about 3pm the next day.
DMARC deliverablity tools suite
Beginn 5. September 2023 um 17:43 UTC · 1d 2h
IssuesGeringfügiger Vorfall
investigating
In the deliverablity tools suite, DMARC data has stopped populating as of September 1st. Engineering is investigating the issue and we hope to have more information and a resolution to this issue soon.
investigating
Still investigating the case.
resolved
This incident has been resolved.
DMARC reporting system.
Beginn 17. August 2023 um 17:10 UTC · 2h 40m
OutageKritischer Vorfall
identified
Our system failed to properly log and summarized inbound aggregate DMARC reports. Our engineers are aware of the issue and are actively working to address this issue as soon as possible.
identified
We are continuing to work on a fix for this issue.
resolved
We’ve corrected the issue with DMARC that was preventing ongoing data collection. Ongoing, inbound DMARC reports should be properly received, parsed, logged and displayed in reporting. If you have any questions, please don’t hesitate to reach out to us at [email protected]
Partial API Outage
Beginn 8. August 2023 um 16:00 UTC · 0m
IssuesGeringfügiger Vorfall
resolved
Just after 11:00 am (central) a routine TLS certificate update caused a misconfiguration. Some users experienced a partial outage.
postmortem
The new SSL cert that was implemented did not support `TLS1.2` . This resulted in issues for only some users where that support was required.