Default message format must be set to use Plain Text.

From Microsoft Outlook 2010 STIG

Part of DTOO314 - Set message format

Associated with: CCI-000366

SV-34105r1_rule Default message format must be set to use Plain Text.

Vulnerability discussion

Outlook uses HTML as the default e-mail format, but users can choose a format other than the default when composing messages. This setting controls the default message format in Outlook.

Check content

The policy value for User Configuration -> Administrative Templates -> Microsoft Outlook 2010 -> Outlook Options -> Mail Format -> Internet Formatting -> Message Format “Set message format” must be “Enabled: Plain Text". Procedure: Use the Windows Registry Editor to navigate to the following key: HKCU\Software\Policies\Microsoft\Office\14.0\outlook\options\mail Criteria: If the value EditorPreference is REG_DWORD = 65536 (dec), this is not a finding.

Fix text

Set the policy value for User Configuration -> Administrative Templates -> Microsoft Outlook 2010 -> Outlook Options -> Mail Format -> Internet Formatting -> Message Format “Set message format” to “Enabled: Plain Text".

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