Delayed email delivery to Microsoft-hosted inboxes

Summary

Delayed email delivery to Microsoft-hosted inboxes

This incident has been resolved.

• Started

  Sep 4, 2026 · 4:19 AM

• Resolved

  Sep 4, 2026 · 7:43 AM

• Duration

  3h 23m

• Severity

  Minor

• ◐

  Investigating

  Sep 4 · 4:19 AM BigCommerce

  We are investigating delayed email delivery for some transactional emails, such as order confirmations and notifications. The delay affects recipients with Microsoft-hosted inboxes (Outlook.com, Microsoft 365). Other email providers are not affected. We will post an update as we have more information.

• ◉

  Monitoring

  Sep 4 · 6:59 AM BigCommerce

  Commerce engineers have applied mitigations to improve email delivery to Microsoft-hosted inboxes (Outlook.com, Microsoft 365). Delivery rates are improving and we are continuing to monitor them.

• ✓

  Resolved

  Sep 4 · 7:43 AM BigCommerce

  This incident has been resolved.