Resend incident

Delivery Delayed Events to Microsoft Hosted Domains

Minor Resolved View vendor source →

Resend experienced a minor incident on July 21, 2026, lasting —. The incident has been resolved; the full update timeline is below.

Started
Jul 21, 2026, 07:39 PM UTC
Resolved
Jul 21, 2026, 07:39 PM UTC
Duration
—
Detected by Pingoru
Jul 21, 2026, 07:39 PM UTC

Update timeline

  1. investigating Jul 20, 2026, 05:47 PM UTC

    Status: Investigating We're currently investigating reports of an increase in Delivery Delayed events to Microsoft-hosted email addresses.

  2. investigating Jul 21, 2026, 01:16 PM UTC

    Status: Investigating We're continuing to investigate the causes of Deliverability Delayed events with Microsoft and working with them directly. Thank you for your patience as we investigate this.

  3. monitoring Jul 21, 2026, 04:39 PM UTC

    Status: Monitoring We've received word from Microsoft that they've addressed the cause of the bounces. While it may still be possible to see emails in the Delivery Delayed status while we wait on retry, newly sent emails are now Delivered.

  4. resolved Jul 21, 2026, 07:39 PM UTC

    Status: Resolved Delivery to Microsoft has returned to normal. Thank you for your patience as we worked with them regarding this.