Verzögerte E-Mail-Zustellung an Microsoft 365

Seit den Morgenstunden ist die Zustellung von E-Mails an Microsoft 365 durch ein Problem bei Microsoft verzögert.

Impact:
- Microsoft 365-Kunden empfangen E-Mails von Nicht-Microsoft-Kunden nur mit Verzögerung oder gar nicht.
- Managed-Office Exchange: Gesendete E-Mails an Empfänger, die Ihre E-Mails über Microsoft abwickeln, werden verzögert zugestellt.
- Managed-Office Hosting-Kunden: Gesendete E-Mails an Empfänger, die Ihre E-Mails über Microsoft abwickeln, werden verzögert zugestellt.

Hier die Details der Microsoft Meldung:

Incident: EX680695

Title: Some users may encounter delays receiving external email messages in Exchange Online
User impact: Users may encounter delays receiving external email messages in Exchange Online.
More info: Affected users may see a "451 4.7.500 Server busy" error message.

Current status: We’ve identified that specific IP addresses are being unexpectedly limited by our anti-spam procedures, causing inbound external email delivery to become throttled and delayed. We're reviewing if there have been any recent changes to our anti-spam rules to understand why the IP addresses are being limited.

Scope of impact: Impact is specific to some users who are served through the affected infrastructure.