How to start SMTP virtualhost [SMTP Virtual Server #1] through powershell or command prompt

To Start:

$SMTP=[adsi]"IIS://localhost/SMTPSVC/1"
$SMTP.ServerState = 2
$SMTP.SetInfo()

To Stop:

$SMTP=[adsi]"IIS://localhost/SMTPSVC/1"
$SMTP.ServerState = 4
$SMTP.SetInfo()