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Unable to deliver this message because the follow error was encountered: &quot;This message is a delivery status notification that cannot be delivered.&quot;.<br />
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The specific error code was 0xC00402C7.
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Unable to deliver this message because the follow error was encountered: "This message is a delivery status notification that cannot be delivered.".

The specific error code was 0xC00402C7.

Unable to deliver this message because the follow error was encountered: &quot;This message is a delivery status notification that cannot be delivered.&quot;.

Interactions between email servers and clients are governed by email protocols. The three most common email protocols are POP, IMAP and MAPI. Most email software operates under one of these (and many products support more than one).  The correct protocol must be selected, and correctly configured, if you want your email account to work.

Email Protocols

IIS is Internet Information Services, the web server included with Windows Server operating systems. All current versions are built on a modular architecture; modules can be added or removed individually so that those required for specific functionality are installed. The full installation of IIS includes HTTP, security, content, compression, caching, logging and diagnostics.

Microsoft IIS Web Server

Active Server Pages (ASP) is Microsoft’s first server-side engine for dynamic web pages. ASP’s support of the Component Object Model (COM) enables it to access and use compiled libraries such as DLLs. It has been superseded by ASP.NET, but will be supported by Internet Information Services (IIS) through at least 2022.

Unable to deliver this message because the follow error was encountered: &quot;This message is a delivery status notification that cannot be delivered.&quot;.

Unable to deliver this message because the follow error was encountered: "This message is a delivery status notification that cannot be delivered.".