如何用ruby发送中文邮件？

Question

require 'net/smtp'

#Senders and Recipients
from_name = 'myname'
from_mail = '[e-mail]'
to_name = 'yourname'
to_mail = '[e-mail]'

#Servers and Authentication
smtp_host = 'smtp.126.com'
smtp_port = 25
smtp_domain = '126.com'
smtp_user = '[e-mail]'
smtp_pwd = 'mypwd'

#The subject and the message
t = Time.now
subj = 'Sending Email with Ruby'
msg_body = "我的测试Check out the instructions on how to send mail using Ruby.\n"

#The date/time should look something like: Thu, 03 Jan 2006 12:33:22 -0700
msg_date = t.strftime("%a, %d %b %Y %H:%M:%S +0800")

#Compose the message for the email
msg = < Date: #{msg_date}
From: #{from_name}
To: #{to_name} <#{to_mail}>
Subject: #{subj}

#{msg_body}

END_OF_MESSAGE

Net::SMTP.start(smtp_host, smtp_port, smtp_domain, smtp_user, smtp_pwd, :plain) do |smtp|
smtp.send_message msg, smtp_user, to_mail
end

发送英文邮件正常，不能发送带中文的邮件
msg_body = "我的测试Check out the instructions on how to send mail using Ruby.\n" 这个信件内容不能有中文
提示错误
sendemail:19: invalid multibyte char (US-ASCII)
sendemail:19: invalid multibyte char (US-ASCII)

那位高手能帮忙解决一下

[b]问题补充：[/b]
我把文件转换成utf-8，还是提示有错误
/usr/local/lib/ruby/1.9.1/net/protocol.rb:291: warning: regexp match /.../n against to UTF-8 string
[b]问题补充：[/b]
转成utf-8的编码，邮件可以收到，但是国内的大部分邮箱都是gbk编码的，
到收件箱里面看到的是乱码，

Answer 1

[quote] warning: regexp match /.../n against to UTF-8 string[/quote]
只是warning没问题的，你看看邮件收到没有