PowerShell

Check if a MIME Entity is multipart/related

Demonstrates the Chilkat Mime.IsMultipartRelated method, which returns whether the Content-Type is exactly multipart/related. It takes no arguments.

Note: The file path is relative to the application's current working directory. Absolute paths may also be used. Supply the path to your own file.

Background: multipart/related signals that the parts belong together — typically an HTML body plus the inline images it references by Content-ID. Detecting it tells your code the non-primary parts are embedded resources, not standalone attachments to list.

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Add-Type -Path "C:\chilkat\ChilkatDotNet47-x64\ChilkatDotNet47.dll"

$success = $false

#  Demonstrates the Mime.IsMultipartRelated method, which returns whether the Content-Type is multipart/related.  It takes no arguments.

$mime = New-Object Chilkat.Mime
$success = $mime.LoadMimeFile("qa_data/multipart_message.eml")
if ($success -eq $false) {
    $($mime.LastErrorText)
    exit
}

if ($mime.IsMultipartRelated()) {
    $("This is a multipart/related entity.")
}
else {
    $("This is not multipart/related.")
}