$disk = Get-WmiObject Win32_LogicalDisk -Filter "DeviceID='C:'" | Select-Object Size, FreeSpace

Write-Host ("{0}GB total" -f [math]::truncate($disk.Size / 1GB))
Write-Host ("{0}GB free on C: OS" -f [math]::truncate($disk.FreeSpace / 1GB))

CompanyDC
CompanyFileServer
CompanyExchange
CompanyRandomServer

$cred = Get-Credential -Credential 'domainuser'
$ServerName = Get-Content "C:tempservers.txt"
$ConvertToGB = (1024 * 1024 * 1024)
$enter1 = "`r"
$enter2 = "`r`n"

# Smtp deets
$smtpServer = "relay.appriver.com"
$smtpPort = "2525"
$smtpFrom = "reporting@yourcompany.com"
$smtpTo = "MyEmail@company.com"
$messageSubject = "Daily Server Report"

# Set up an SmtpClient
$smtpClient = New-Object Net.Mail.SmtpClient
$smtpClient.Host = $smtpServer
$smtpClient.Port = $smtpPort

# Create the MailMessage
$mailMessage = New-Object Net.Mail.MailMessage
$mailMessage.From = $smtpFrom
$mailMessage.To.Add($smtpTo)
$mailMessage.Subject = $messageSubject
$mailMessage.IsBodyHtml = $true

# style
$htmlReport += "<style>"
$htmlReport += "BODY{background-color:white;}"
$htmlReport += "TABLE{border-width: 1px;border-style: solid;border-color: black;border-collapse: collapse;}"
$htmlReport += "TH{border-width: 1px;padding: 0px;border-style: solid;border-color: black;}"
$htmlReport += "TD{border-width: 1px;padding: 0px;border-style: solid;border-color: black;}"
$htmlReport += "</style>"


# table
$htmlReport += "<table>"
$htmlReport += "`n"
$htmlReport += "<tr>"
$htmlReport += "<th>ServerName</th>"
$htmlReport += "<th>Total Space</th>"
$htmlReport += "<th>Free Space</th>"
$htmlReport += "<th>Percent Free</th>"
$htmlReport += "</tr>"
foreach($Server in $ServerName)
{
    $disk = Get-WmiObject -Credential $cred Win32_LogicalDisk -ComputerName $Server -Filter "DeviceID='C:'" | Select-Object Size,FreeSpace
    $htmlReport += "<tr>"
    $htmlReport += "<td>$($Server)</td>"
    $htmlReport += "<td>$([Math]::Truncate($disk.Size / $ConvertToGB))  GB </td>"
    $htmlReport += "<td>$([Math]::Truncate($disk.FreeSpace / $ConvertToGB))  GB </td>"
    if([Math]::Truncate(($disk.FreeSpace / $disk.size) * 100) -le 10)
    {
        $htmlReport += "<td><font color=red> $([Math]::Truncate(($disk.FreeSpace / $disk.size) * 100))  % </font></td>"
    }
    if([Math]::Truncate(($disk.FreeSpace / $disk.size) * 100) -gt 10 -and [Math]::Truncate(($disk.FreeSpace / $disk.size) * 100) -le 20)
    {
        $htmlReport += "<td><font color=orange> $([Math]::Truncate(($disk.FreeSpace / $disk.size) * 100))  % </font></td>"
    }
    if([Math]::Truncate(($disk.FreeSpace / $disk.size) * 100) -gt 20)
    {
        $htmlReport += "<td><font color=green> $([Math]::Truncate(($disk.FreeSpace / $disk.size) * 100))  % </font></td>"
    }
    $htmlReport += "</tr>"
}

$htmlReport += "</table>"



# Now create an AlternateView from the HTML contents
$messageBody = [Net.Mail.AlternateView]::CreateAlternateViewFromString($htmlReport, 'text/html')

# Add the HTML view to the MailMessage
$mailMessage.AlternateViews.Add($messageBody)

# And finally send the message
$smtpClient.Send($mailMessage)
pause