The central data resources at Hup are growing all the time, learning and refining the rules that the email checker uses in real time. Hup have processed over 1 million email addresses and the accumulated knowledge is made available to all Hup users automatically. No monthly updates, no CDs or floppies to remember to load - a true centralised application. From time to time, there may be simple minor changes required to the integration code on a client site - but that's it!