MEDIUMVulnerability
Global

Microsoft fixes Classic Outlook bug causing email delivery issues

Monday, April 6, 2026 at 07:19 PM UTC·Source: BleepingComputer

Updated: Monday, April 6, 2026 at 07:20 PM UTC

Executive Summary

Microsoft has resolved a known issue that was preventing some Classic Outlook users from sending emails via Outlook.com. [...]

Analysis

Microsoft has resolved a known issue that was preventing some Classic Outlook users from sending emails via Outlook.com. [...]

Indicators of Compromise (1)

Domain (1)
Outlook.com
VirusTotalURLhaus
Source Attribution

Originally published by BleepingComputer on Apr 6, 2026.

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