Browse your email from PowerShell like a folder

Mount Outlook Drive

Import-Module Simplex

New-PSDrive mail -psprovider simplex -root "C:\Temp\outlookprov.ps1"

cd mail:\Inbox

Outlook Mail PowerShell Provider

Add-type -assembly "Microsoft.Office.Interop.Outlook" | Out-Null 
$olFolders = "Microsoft.Office.Interop.Outlook.olDefaultFolders" -as [type]  
$outlook = new-object -comobject outlook.application 
$namespace = $outlook.GetNameSpace("MAPI") 
$inbox = $namespace.getDefaultFolder($olFolders::olFolderInBox)

root {
    script Inbox {    
        $inbox.Items
    }

    $inbox.Folders | foreach-object {
        $subFolder = $_
        $content = Split-Path $subFolder.folderpath -Leaf
        
        script "$content" {
            $subFolder.Items
        }.GetNewClosure();
    }

}

Reply & Forward

function Send-MailReply
{
    [CmdletBinding()]
    Param
    (
        # Param1 help description
        [Parameter(Mandatory=$true,
                   ValueFromPipeline=$true,
                   Position=1)]
        $InputObject,

        # Param2 help description
        [Parameter(Mandatory=$true,
                   Position=0)]
        [string]
        $To
    )

    Process
    {
        $newMessage = $InputObject.Reply()
        $newMessage.To = $To
        $newMessage.Send()
    }
}

function Send-MailForward
{
    [CmdletBinding()]
    Param
    (
        # Param1 help description
        [Parameter(Mandatory=$true,
                   ValueFromPipeline=$true,
                   Position=1)]
        $InputObject,

        # Param2 help description
        [Parameter(Mandatory=$true,
                   Position=0)]
        [string]
        $To
    )

    Process
    {
        $newMessage = $InputObject.Forward()
        $newMessage.To = $To
        $newMessage.Send()
    }
}

# Example
PS mail:\Inbox> ls | select -first 1 | Send-MailForward someemail@mydomain.me

The child of Get Outlook Inbox and Simplex.

Added example Reply and Forward functions.

Started a full repo: https://github.com/cdhunt/OutlookCLI