clbs.mobi.		30 IN SOA dns.tsinghua.edu.cn. szhu.dns.edu.cn. (
				2012051021 ; serial
				86400      ; refresh (1 day)
				7200       ; retry (2 hours)
				604800     ; expire (1 week)
				86400      ; minimum (1 day)
				)

clbs.mobi.		30 IN TXT "v=spf1 ip4:203.91.120.0/22 ip6:2001:da8:217::/48 -all"

clbs.mobi.		30 IN A	203.91.121.21
clbs.mobi.		30 IN AAAA 2001:da8:217:1210::21

Mail exchangers:
clbs.mobi.		30 IN MX 0 mail.clbs.mobi.

Name servers:
clbs.mobi.		30 IN NS dns.tsinghua.edu.cn.
clbs.mobi.		30 IN NS dns.edu.cn.