: foreach( address, port = 110, account, password ) {|mail| .... }
    POP å򳫤оΤ٤ƤΥ᡼ФƷ֤ޤ
    ʲƱǤ

        Net::POP3.start( address, port, account, password ) {|pop|
          pop.each_mail do |m|
            yield m
          end
        }

        # example
        Net::POP3.foreach( 'your.pop.server', 110,
                           'YourAccount', 'YourPassword' ) do |m|
          file.write m.pop
          m.delete if $DELETE
        end

