sendmail.rb

# USAGE:
#   echo "ほげ" | ruby sendmail.rb smtp.fuga.com [email protected]
#
require 'kconv'
require 'net/smtp'

my_server = ARGV[0]
my_address = ARGV[1]

mail_body =<<EOM
From: Auto downloader <#{my_address}>
To: Administrator <#{my_address}>
Subject: Batch log (#{Time.now.strftime("%Y-%m-%d %H:%M")})
Date: #{Time.now.strftime "%a, %d %b %Y %X +0900"}
Message-Id: <#{Time.now.to_i}>

#{STDIN.read.tojis}

--
from Batch program at #{Time.now.strftime "%a, %d %b %Y %X +0900"}
EOM

Net::SMTP.start( my_server, 25 ) {|smtp|
  smtp.send_mail mail_body.tojis, my_address, my_address
}