Ensure SMTP AUTH is disabled

보통레벨 1수동 검토m365

설명

This setting enables or disables authenticated client SMTP submission (SMTP AUTH) at an organization level in Exchange Online. The recommended state is Turn off SMTP AUTH protocol for your organization (checked). SMTP AUTH is a legacy protocol. Disabling it at the organization level supports the principle of least functionality and serves to further back additional controls that block legacy protocols, such as in Conditional Access. Virtually all modern email clients that connect to Exchange Online mailboxes in Microsoft 365 can do so without using SMTP AUTH.

점검 방법

감사 방식: 수동 검토

이 권장 사항은 자동으로 점검할 수 없습니다. --include-manual 옵션을 전달하면 스캔 결과에 이 지침과 함께 표시됩니다.

To audit using the UI: 1. Navigate to Exchange admin center https://admin.exchange.microsoft.com. 2. Expand Settings and select Mail flow. 3. Ensure Turn off SMTP AUTH protocol for your organization is checked. To audit using PowerShell: 1. Connect to Exchange Online using Connect-ExchangeOnline. 2. Run the following PowerShell command: Get-TransportConfig | Format-List SmtpClientAuthenticationDisabled 3. Verify that the value returned is True.

조치 방법

조치 방식: 가이드 또는 인프라 패치

To remediate using the UI: 1. Navigate to Exchange admin center https://admin.exchange.microsoft.com. 2. Expand Settings and select Mail flow. 3. Check Turn off SMTP AUTH protocol for your organization to disable the protocol. To remediate using PowerShell: 1. Connect to Exchange Online using Connect-ExchangeOnline. 2. Run the following PowerShell command: Set-TransportConfig -SmtpClientAuthenticationDisabled $true

속성

운영 체제: 모두
태그: authm365saas
참고 자료: CIS Microsoft 365 Foundations Benchmark v7.0.0 - 6.5.4 Ensure SMTP AUTH is disabled