Outage
Outlook.com bounces legit emails as Microsoft's authentication crackdown goes sideways
The Register · By Richard Speed ·
The Brief
- A validation error is stopping Outlook.com from accepting some legitimate emails.
- Affected users report non-delivery reports with error codes related to SPF (Sender Policy Framework) validation failures.
- The problem appears widespread according to reports from affected users.
Why it matters
Developers and services sending email to Outlook.com addresses may see legitimate messages bounced, so transactional or notification emails could fail to arrive.
Who’s affected
- Teams sending email to Outlook.com recipients
- Anyone running mail servers or services that rely on SPF authentication
- #outlook
- #spf
- #authentication
- #deliverability
- #microsoft
A validation error has stopped Outlook.com from accepting legitimate emails. The problem appears widespread and, according to reports from affected users, can result in non-delivery reports with error codes related to SPF (Sender Policy Framework) validation failures. Other users…