All Systems Operational

About This Site

Get an update on ZeroBounce's system performance with real-time and historical data. Scheduled maintenance and reports can be found here with dates and times.

Uptime over the past 90 days. View historical uptime.
API Operational
API-US Operational
API-EU Operational
Bulk API Operational
Website Members Section Operational
Website & Documents Operational
Stripe JS Operational
Cloudflare Los Angeles, CA, United States - (LAX) Operational
Cloudflare Miami, FL, United States - (MIA) Operational
Statuspage System Metrics Operational
Cloudflare Newark, NJ, United States - (EWR) 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.

Nov 14, 2026

Delayed results for Microsoft-hosted email addresses
Resolved - This incident has been resolved. Microsoft has restored its email services, and validation for Microsoft-hosted addresses (Outlook, Hotmail, Live, MSN and Microsoft 365) is back to normal processing times. Warmup and Inbox Placement Tester results are also back to normal.

If you received “unknown” validation results for Microsoft addresses during the incident, we recommend re-validating them. If you ran Inbox Placement tests during this period, re-run them for accurate Microsoft placement data.

Non-Microsoft providers were not affected at any point. Thank you for your patience.
Nov 14, 00:05 PST
Monitoring - Microsoft reports broad recovery across its email services, and we’re seeing errors for Microsoft-hosted addresses drop significantly. Validation is returning to normal processing times.

Because Microsoft is still clearing a backlog of delayed messages (held for up to 48 hours), warmup activity and Inbox Placement Tester results involving Outlook, Hotmail, Live, MSN and Microsoft 365 inboxes may continue to show late or incomplete deliveries for a while. For accurate Microsoft placement data, we recommend re-running tests once this incident is marked resolved.

All other email providers remain unaffected. We’ll post a final update once Microsoft confirms full resolution.
Nov 13, 12:02 PST
Update - We’re tracking Microsoft’s progress and will post an update as soon as we see recovery.
Nov 13, 03:52 PST
Identified - We’re aware of an ongoing Microsoft service disruption affecting their mail infrastructure. Validation requests for Microsoft-hosted addresses (e.g. Outlook, Hotmail, Live, MSN and Microsoft 365 business domains) may take longer than usual to process, and some may temporarily return as “unknown.”

All other email providers are unaffected, and our platform is fully operational. Validation, scoring and API services for non-Microsoft addresses continue to run normally.

Warmup activity involving Microsoft inboxes may also see delays until the disruption is resolved.

Inbox Placement Tester: Results for Microsoft seed inboxes (Outlook, Hotmail, Microsoft 365) may be delayed or temporarily incomplete. Placement results for Gmail, Yahoo and other providers are not affected. If you need full Microsoft results, we recommend re-running the test once the disruption is resolved.

No action is needed on your end. We’re monitoring Microsoft’s status and will post an update once their service is restored. For time-sensitive lists, we recommend re-validating any “unknown” Microsoft results after the incident is resolved.
Nov 13, 03:51 PST

Nov 13, 2026

Nov 12, 2026

No incidents reported.

Nov 11, 2026

No incidents reported.

Nov 10, 2026

No incidents reported.

Nov 9, 2026

No incidents reported.

Nov 8, 2026

No incidents reported.

Nov 7, 2026

No incidents reported.

Nov 6, 2026

No incidents reported.

Nov 5, 2026

No incidents reported.

Nov 4, 2026

No incidents reported.

Nov 3, 2026

No incidents reported.

Nov 2, 2026

No incidents reported.

Nov 1, 2026

No incidents reported.

Oct 31, 2026

No incidents reported.

Incident History Powered by Atlassian Statuspage