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![MS-SMTPNTLM]: SMTP Client Successfully Authenticating to an SMTP Server | Microsoft Docs](https://docs.microsoft.com/en-us/openspecs/windows_protocols/ms-smtpntlm/ms-smtpntlm_files/image004.png "MS-SMTPNTLM]: SMTP Client Successfully Authenticating to an SMTP Server | Microsoft Docs")
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