Service Alert: Microsoft Email Delivery Delays — November 12-13, 2026

Microsoft is currently experiencing a widespread outage affecting Outlook, Exchange Online, and other Microsoft 365 services. As a result, emails sent to recipients using these services may be delayed until Microsoft resolves the issue.

If your mailing list includes a significant number of Microsoft email users, you may notice temporarily lower open and click rates while deliveries are delayed.

There is no need to resend your campaign. Direct Mail will automatically retry temporarily delayed deliveries until Microsoft's servers are accepting mail again. No action is required on your part.

For updates, visit Microsoft's Service Status page or Microsoft 365 Status on X. We'll also update this notice as more information becomes available.

Hilfedokumentation 〉Ältere Versionen von Direct Mail 〉Design-Tests 〉

About design tests

Tut uns leid, dieser Hilfe-Artikel ist zurzeit nicht in Deutsch verfügbar. Wenn Sie möchten, können Sie eine Übersetzung von Google versuchen.

Dieser Hilfeartikel bezieht sich auf eine alte Version von Direct Mail.

A design test is set of screenshots that show you what your email looks like when it is opened in variety of different email clients (including Windows, web-based, and mobile email clients). You can use design tests to make sure that your email design looks good when it is opened in the email clients that you care about (e.g. popular email clients that your recipients use).

design-test-browser.png

Creating a design test takes only a few seconds and results are available right away.

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