semp.pl.		30 IN SOA ns1.cal.pl. hostmaster.semp.pl. (
				2023102400 ; serial
				3600       ; refresh (1 hour)
				3600       ; retry (1 hour)
				1209600    ; expire (2 weeks)
				86400      ; minimum (1 day)
				)

semp.pl.		30 IN TXT "v=spf1 a mx ip4:148.251.196.10 include:spf.cal.pl ~all"

semp.pl.		30 IN A	148.251.196.10

Mail exchangers:
semp.pl.		30 IN MX 10 mail.semp.pl.

Name servers:
semp.pl.		30 IN NS ns1.cal.pl.
semp.pl.		30 IN NS ns2.cal.pl.