SMTP server error: User is locked by your organization's security defaults policy

ERROR

Meaning:

Steps to Fix the Issue

Option 1: Disable Security Defaults (Tenant Level)

  1. Log in to the Microsoft Entra (Azure AD) Portal: https://entra.microsoft.com/

  2. Go to: IdentityOverviewProperties

  3. Scroll to bottom, and look for: "Security defaults" → Set to "No"

  4. Save changes.


Option 2: Enable SMTP AUTH for the Specific Mailbox

  1. Navigate to: UsersActive Users → click info@extrakamai.com

  2. In the right pane, click Mail → Manage email apps

  3. Ensure "Authenticated SMTP" is enabled


REFERENCES

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