nextra.cz.		30 IN SOA dns.nextra.cz. hostmaster.cz.net. (
				2024051600 ; serial
				28800      ; refresh (8 hours)
				7200       ; retry (2 hours)
				604800     ; expire (1 week)
				86400      ; minimum (1 day)
				)

nextra.cz.		30 IN TXT "v=spf1 mx ip4:193.85.5.19 ip4:193.85.5.39 ip4:193.85.2.13
ip4:193.85.1.72 ip4:212.65.193.3 ~all"

Mail exchangers:
nextra.cz.		30 IN MX 100 bmx.cz.net.
nextra.cz.		30 IN MX 10 vmail.nextra.cz.

Name servers:
nextra.cz.		30 IN NS dns.nextra.cz.
nextra.cz.		30 IN NS sns.nextra.cz.