mailcount.rb

#!/usr/bin/ruby

require 'net/imap'

user = 'nokogiri@user-helfen-usern.de'
pass = 'SUPERSECRETPASSWORD'
folder = ['INBOX','1und1']

box = Net::IMAP.new('uhuc.de','993',true)
box.authenticate('LOGIN', user, pass)
folder.each do |dir|
    box.examine(dir)
    new = box.search(['RECENT']).count
    old = box.search(['NOT','NEW']).count
    puts "#{dir} \t#{new}/#{old}"
end

box.logout()