Hornetsecurity Outage History

Hornetsecurity is up right now

Hornetsecurity had 8 outages in the last 2 years totaling 687h 55m of downtime — averaging 0.3 incidents per month.

There were 8 Hornetsecurity outages since June 2, 2026 totaling 687h 55m of downtime. Each is summarised below — incident details, duration, and resolution information.

Source: https://status.hornetsecurity.com

Minor October 6, 2026

[HSE20261006-01-I] Incident: Degraded Performance: Hornet Email Service Inbound

Detected by Pingoru
Oct 06, 2026, 10:22 AM UTC
Resolved
Oct 07, 2026, 12:46 PM UTC
Duration
1d 2h
Affected: Hornet.emailWebsite (Germany - Hannover)Teams Protection (Germany - Düsseldorf)Teams Protection (Germany - Frankfurt)
Timeline · 4 updates
  1. investigating Oct 06, 2026, 10:22 AM UTC

    We are currently investigating delays affecting the Hornet E-Mail service. Users may notice a delay before newly received emails appear in the webmail client.

  2. identified Oct 06, 2026, 11:40 AM UTC

    The root cause has been identified, and our team is actively working on a fix.

  3. monitoring Oct 06, 2026, 02:11 PM UTC

    The fix has been deployed. Inbound emails are now flowing normally into webmail, and we will continue to monitor system stability before marking this incident resolved.

  4. monitoring Oct 07, 2026, 09:01 AM UTC

    The fix has been deployed. Inbound emails are now flowing normally into webmail, and we will continue to monitor system stability before marking this incident resolved.

Read the full incident report →

Minor September 30, 2026

[HSE2026-09-I] Incident: Degraded Performance: Email Live Tracking

Detected by Pingoru
Sep 30, 2026, 06:54 AM UTC
Resolved
Sep 30, 2026, 01:20 PM UTC
Duration
6h 26m
Affected: Control PanelWebsite (Germany - Hannover)Teams Protection (Germany - Düsseldorf)Teams Protection (Germany - Frankfurt)
Timeline · 2 updates
  1. investigating Sep 30, 2026, 06:54 AM UTC

    The Email Live Tracking is only available with a degraded performance. The cause is currently being analyzed in more detail. Other services and email flow are not affected.

  2. monitoring Sep 30, 2026, 08:12 AM UTC

    The Email Live TrackinService is operational again. The incident is currently still being monitored.

Read the full incident report →

Minor September 13, 2026

[HSE20260913-01-I] Incident: Partial Service Disruption: 365 Total Backup Service (DE Region)

Detected by Pingoru
Sep 13, 2026, 10:48 AM UTC
Resolved
Sep 14, 2026, 07:36 AM UTC
Duration
20h 47m
Affected: 365 Total BackupTeams Protection (Germany - Frankfurt)
Timeline · 1 update
  1. identified Sep 13, 2026, 10:48 AM UTC

    The 365 Total Backup Service is partially disrupted for a small subset of tenants on the DE Region. The root cause has already been identified and our Technical Teams are currently working on a solution. We will keep this space updated as soon as we have an update on the progress. All other services and regions are not affected.

Read the full incident report →

Minor July 29, 2026

[HSE20260729-01-I] Incident: Partial Service Disruption: German Service Hotline

Detected by Pingoru
Jul 29, 2026, 09:53 AM UTC
Resolved
Jul 29, 2026, 11:26 AM UTC
Duration
1h 33m
Affected: Ticket SystemTicket System (Europe - West)
Timeline · 1 update
  1. investigating Jul 29, 2026, 09:53 AM UTC

    The German Support Hotlines are partially disrupted. The cause is currently being analyzed in more detail. If you want to reach the support please try our alternative number at +49 511 36734290 or send an email towards [email protected]. Other services and email flow are not affected.

Read the full incident report →

Minor June 2, 2026

Deferred emails to Microsoft Tenants

Detected by Pingoru
Jun 02, 2026, 02:48 PM UTC
Resolved
Jun 02, 2026, 11:06 PM UTC
Duration
8h 18m
Affected: Mail TrafficEmail OutboundEmail Outbound (Frankfurt)Email Outbound (Hannover)
Timeline · 2 updates
  1. 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.

  2. 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.

Read the full incident report →