# Delays sending to Microsoft-hosted domains

- Provider: [SMTP2GO](https://down.guide/providers/smtp2go)
- Confidence: Confirmed
- Impact: Operational
- lasted 1d
- started 2026-02-26 03:01 UTC
- Email sending (SMTP service), API Servers
- id: DWN-ce2c3453e7
- Official page: https://stspg.io/xplrbzkctl6w

## Updates from SMTP2GO
### 2026-02-26 03:01 UTC: monitoring
We are currently aware of a global issue affecting emails sent to Microsoft-hosted domains (such as hotmail.com, outlook.com, live.com, etc.). Emails affected will show as "Processed" on the "Reports \> Activity" page, and delivery attempts encounter "451 4.7.650……….." responses. This is a Microsoft-wide issue affecting multiple SMTP providers/ESPs, and we are monitoring it closely as they actively work on a fix. Thanks for your patience.

### 2026-02-27 03:08 UTC: resolved
This incident has been resolved.

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