willycast

Hello, Two weeks ago I configured a DVR (AVTech KPD677ZL (EU)) with the default DDNS ("name.ddns.dvrtw.com.tw") but I doesn't write a e-mail account. These days the DDNS works good, but yesterday fails. Now I configured another time with an email account and works good. Do you know if the issue was that I doesn't write an email?? The AVTech DDNS is recommended? When 15 days passed, the DDNS will fail another time? In the DVR the other DDNS server that appears are: dyndns, statdns, cn99, no-ip, myq-see. thank you a lot for the help, and i'm sorry for my 'english'! goodbye.