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SMTP Outage History

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

There were 58 SMTP outages since June 2022. The 8 outages from the last 12 months are summarized below, with incident details, duration, and resolution information.

Major June 3, 2026

June 2026: Email Delivery Delay

Detected Jun 3, 2026 4:59 AM EDT · Resolved Jun 3, 2026 6:31 AM EDT · Duration about 2 hours

The SMTP service experienced a major incident causing delays in email delivery that affected email delivery, API, and statistics components for 1.5 hours. The engineering team investigated the issue and identified the root cause. The problem was resolved and the service was returned to normal operation with continued monitoring.

Minor April 27, 2026

April 2026: Complaints issue

Detected Apr 27, 2026 1:36 PM EDT · Resolved Apr 28, 2026 3:14 AM EDT · Duration about 14 hours

A complaints processing issue affected historical data in the SMTP service's Statistics component for 13.6 hours. While new complaints continued to be processed normally in real time, there was a delay in processing older complaint records. The engineering team investigated and resolved the issue.