Send an email with or without SSL via powershell.

posh_sendSMTPEmail.ps1

# Sender and Recipient Info
$MailFrom = "[email protected]"
$MailTo = "[email protected]"

# Sender Credentials
$Username = ""
$Password = ""

# Server Info
$SmtpServer = ""
$SmtpPort = "25"

# Message stuff
$MessageSubject = "Test" 
$Message = New-Object System.Net.Mail.MailMessage $MailFrom,$MailTo
$Message.IsBodyHTML = $true
$Message.Subject = $MessageSubject
$Message.Body = "Test"

# Construct the SMTP client object, credentials, and send
$Smtp = New-Object Net.Mail.SmtpClient($SmtpServer,$SmtpPort)
$Smtp.EnableSsl = $true
$Smtp.Credentials = New-Object System.Net.NetworkCredential($Username,$Password)
$Smtp.Send($Message)