# File /home/matt/rubymail/mail/deliver.rb, line 28
    def deliver_mbox(filename, message)
      File.open(filename, File::WRONLY|File::APPEND|File::CREAT|File::SYNC,
		0600) { |f|
	f.flock(File::LOCK_EX)
	first = true
	message.each { |line|
	  if first
	    first = false
	    if line !~ /^From .*\$/
              from = "From foo@bar  " + Time.now.asctime + "\n"
	      f << from
	    end
	  elsif line =~ /^From /
	    f << '>'
	  end
	  f << line
	  f << "\n" unless line[-1] == ?\n
	}
	f << "\n"
	f.flush
	f.flock(File::LOCK_UN)
      }
    end