noein

とっても簡単でした。が、もっと短く書きたいよ。。。

$from = New-Object System.Net.Mail.MailAddress("送り元アドレス","送信者名")
$to = New-Object System.Net.Mail.MailAddress("送り先アドレス","受信者名")
$mail = New-Object System.Net.Mail.MailMessage($from,$to)
$mail.Subject = "件名"
$mail.Body = "本文"
$mailer = New-Object System.Net.Mail.SmtpClient("smtp.gmail.com ",587)
$mailer.EnableSsl=$True
$mailer.Credentials= New-Object System.Net.NetworkCredential("ユーザ名","パスワード")
$mailer.send($mail)