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require 'net/imap'

class Net::IMAP
  def get_msg_info(msg_sequence_num)
    # code we used above
    fetch_result = fetch(msg_sequence_num, '(UID ENVELOPE)')
    envelope = fetch_result[0].attr['ENVELOPE']
    uid = fetch_result[0].attr['UID']
    info = {'UID'     => uid,
            'Date'    => envelope.date,
            'From'    => envelope.from[0].name,
            'To'      => envelope.to[0].name,
            'Subject' => envelope.subject}
  end
end

conn.search(['BEFORE', '01-Jan-2006',
             'SINCE', '01-Jan-2000']).each do |sequence|
    conn.get_msg_info(sequence).each {|key, val| puts "#{key}: #{val}" }
end