Hi guys, I have a little problem (well isn't little any more), a client said they don't have revers resolution for theirs mails servers. I checked and the server resolves it right: ;; ANSWER SECTION: 16.224.107.200.in-addr.arpa. 86400 IN PTR pop3.mdidacticoregional.com.ar. 16.224.107.200.in-addr.arpa. 86400 IN PTR nexion.com.ar. 16.224.107.200.in-addr.arpa. 86400 IN PTR mdidacticoregional.com.ar. 16.224.107.200.in-addr.arpa. 86400 IN PTR ftp.nexion.com.ar. 16.224.107.200.in-addr.arpa. 86400 IN PTR ftp.mdidacticoregional.com.ar. 16.224.107.200.in-addr.arpa. 86400 IN PTR www.nexion.com.ar. 16.224.107.200.in-addr.arpa. 86400 IN PTR www.mdidacticoregional.com.ar. 16.224.107.200.in-addr.arpa. 86400 IN PTR mail.nexion.com.ar. 16.224.107.200.in-addr.arpa. 86400 IN PTR pop3.nexion.com.ar. but I checked it in http://pingability.com/zoneinfo.jsp?domain=nexion.com.ar and say the domine doen's have reverse resolution... , there isn't revers resolution in other servers than the local. I don't understand what is happending, y chage the serial numbers and steal nothing. This only happends in this domine, the others run well. any idea? The domine is nexion.com.ar, ip 200.107.224.16, dns 200.5.90.197.