>>643 これでいいや

SMTP_SERVER = 'mail.example.com'
SMTP_USER = 'hogehoge'
SMTP_PASSWD = 'fugafuga'
FROM_ADDR = '[email protected]'
TO_ADDR = '[email protected]'

mail = <<_E
From: #{FROM_ADDR}
To: #{TO_ADDR}
Subject: Ruby bug report
MIME-Version: 1.0
Content-Transfer-Encoding: 7bit
Content-Type: text/plain; charset=iso-2022-jp

#{STDIN.gets(nil)}
_E

require 'net/smtp'
require 'nkf'
Net::SMTP.start(SMTP_SERVER, 25, 'localhost.localdomain', SMTP_USER, SMTP_PASSWD, :cram_md5) do |smtp|
smtp.send_mail(NKF.nkf('-m0 -j', mail), FROM_ADDR, TO_ADDR)
end