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PriyaJayaraman-7005 asked BruceZhang-MSFT commented

SMTP server 6.0 in windows 2016

Hi Team,

SMTP server 6.0 installed windows 2016 functioning as Email relay for internal organization with O-365. Can we disable TLS 1.0/1.1 on the windows server 2016 with SMTP server 6.0.

Cheers!
Priya

windows-server-iis
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Hi @PriyaJayaraman-7005 ,

If you diable TLS on windows server 2016, not only SMTP, but also other requests will be affected. This setting is for the global rather than individual. For security reasons, this is not recommended.

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lextm answered

As revealed in the article,

"The IIS SMTP Virtual Server Component that is mentioned in this article is part of IIS 6.0, the support for which has ended with the support of Windows Server 2003. To relay emails to Office 365, use one of the supported versions of Exchange Server."

So in no case you should install and use that "IIS SMTP Virtual Server Component" at this moment. You have to uninstall it and use Exchange Server instead.

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PriyaJayaraman-7005 answered BruceZhang-MSFT commented

Hi Lextm,

Thanks for your answer. Please share why MS has added this feature IIS 6.0 into windows 2016 if the feature is not supported.

Thanks
Priya

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Hi @PriyaJayaraman-7005 ,

The version of IIS in windows server 2016 is IIS 10. IIS 6 can only in older windows server, such as 2008.

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