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MxToolbox Outage History

Every past MxToolbox outage tracked by IsDown, with detection times, duration, and resolution details.

There were 52 MxToolbox outages since February 2019. The 9 outages from the last 12 months are summarized below, with incident details, duration, and resolution information.

Minor February 23, 2026

February 2026: Red MxError / Parse Syntax in Monitoring and Notification UI

Detected Feb 23, 2026 3:15 PM EST · Resolved Feb 24, 2026 11:06 AM EST · Duration about 20 hours

Minor February 13, 2026

February 2026: MailFlow Monitoring Impacted by SpamHaus Blocklisting

Detected Feb 13, 2026 11:46 AM EST · Resolved Feb 13, 2026 4:37 PM EST · Duration about 5 hours

Major December 10, 2025

December 2025: MxToolbox Monitoring & Delivery Center Outage

Detected Dec 10, 2025 1:26 PM EST · Resolved Dec 10, 2025 2:32 PM EST · Duration about 1 hour

Major October 20, 2025

October 2025: MailFlow Monitoring Down / AWS Outage

Detected Oct 20, 2025 11:18 AM EDT · Resolved Oct 23, 2025 11:31 AM EDT · Duration 3 days

Major October 1, 2025

October 2025: MailFlow Monitors Latency Issues

Detected Oct 1, 2025 10:35 AM EDT · Resolved Oct 1, 2025 4:34 PM EDT · Duration about 6 hours

Major September 11, 2025

September 2025: MxToolbox Outage 20250911

Detected Sep 11, 2025 12:17 PM EDT · Resolved Sep 11, 2025 5:00 PM EDT · Duration about 5 hours

Major August 4, 2025

August 2025: MailFlow Down

Detected Aug 4, 2025 11:33 AM EDT · Resolved Aug 4, 2025 2:57 PM EDT · Duration about 3 hours

Minor July 21, 2025

July 2025: Error on Managed Domains Page / Delivery Center

Detected Jul 21, 2025 11:31 AM EDT · Resolved Jul 22, 2025 11:19 AM EDT · Duration about 24 hours

Major June 18, 2025

June 2025: MxToolbox & Deliver Center Loading Issues

Detected Jun 18, 2025 4:36 PM EDT · Resolved Jun 18, 2025 5:27 PM EDT · Duration about 1 hour