Is Hornetsecurity down?
Last checked just nowNo incidents right now.
Hornetsecurity is operational right now. Last checked just now; the most recent incident resolved 10h ago.
Real-time Hornetsecurity status, recent outages, and incident history — pulled directly from Hornetsecurity's official status page at https://status.hornetsecurity.com every 5 minutes. Pingoru tracks 84 Hornetsecurity services and has captured 4 incidents in the last 90 days (99.95% uptime). Get email, Slack, Discord, or webhook alerts the moment Hornetsecurity reports a new incident — free for 5 monitors, no credit card.
Recent outages & incidents
Past 90 days- Email InboundEmail OutboundFrankfurtHannover
Timeline · 2 updates
- investigating · Jun 02, 2026, 02:48 PM UTC
We observe reports of emails being deferred when the receiving Host is a Microsoft Tenant. From our current Observations this seems to only affect German M365 Tenants. The behavior can be identified by following SMTP Code: 421 4.3.2 The maximum number of concurrent connections per resource forest has exceeded a limit, closing transmission channel Affected emails are in the deferred state. We are trying to deliver inbound deferred emails for up to 7 days and outbound emails we are trying to deliver up to 24 hours. Other services are not affected.
- monitoring · Jun 02, 2026, 03:32 PM UTC
Microsoft is working to resolve the observed issue as soon as possible. More Details can be found here: https://admin.cloud.microsoft/#/servicehealth/:/alerts/EX1331830 We are monitoring the situation closely. Other services are not affected.
Latest: Microsoft is working to resolve the observed issue as soon as possible. More Details can be found here: https://admin.cloud.microsoft/#/servicehealth/:/alerts/EX1331830 We are moni…
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- Deferred emails to Microsoft Tenants ResolvedStarted Jun 02, 2026, 02:48 PM UTC · Resolved Jun 02, 2026, 11:06 PM UTC · 8h 18m