Email throttling for clients without Microsoft connector

Incident Report for OutKept

Identified

We are currently observing email throttling affecting some Microsoft tenants, which may result in emails being delayed, queued for extended periods, or taking longer than expected to reach recipients.

This occurs when Microsoft enforces rate limits in environments where the Microsoft connector is not yet configured, particularly during periods of higher email traffic.

Configuring the connector as outlined in our documentation helps prevent this behavior and ensures reliable email delivery.

You can find the setup documentation here:
https://docs.google.com/document/d/1e35TpXGyYy-temuoU2h5GVb-MpL0m6GPouniUHuXCCI/edit?tab=t.0#heading=h.py3bocr0huhs

If the connector has already been set up and you are still experiencing delivery issues, please contact our support team so we can investigate further.
Posted Jan 27, 2026 - 11:24 CET
This incident affects: Phishing Simulations.