Jan 28 2026
Microsoft Exchange Online to End Support for SMTP AUTH Basic Authentication - gbhackers.com
- arrow_right_alt Microsoft is discontinuing SMTP AUTH basic authentication in Exchange Online, forcing migration to modern authentication methods
- arrow_right_alt Organizations must transition to OAuth 2.0 or certificate-based authentication for email delivery
- arrow_right_alt Legacy applications and third-party integrations relying on basic SMTP authentication will be affected
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