: ready( from_addr, *to_addrs ) {|adapter| .... }
    ᡼񤭤ߤν򤷤ǡwrite ᥽åɤĥ֥Ȥ
    ֥åˤޤfrom_addr ᡼륢ɥ쥹 to_addrs 
    Υ᡼ܥåǤ

        # example
        Net::SMTP.start( 'your.smtp.server', 25 ) {|smtp|
	    smtp.ready( 'from@mail.addr', 'dest@mail.addr' ) {|f|
                f.puts 'From: aamine@loveruby.net'
                f.puts 'To: someone@somedomain.org'
                f.puts 'Subject: test mail'
                f.puts
                f.puts 'This is test mail.'
	    }
        }

