stts.ir.		30 IN SOA ns2.stts.ir. admin.stts.ir. (
				11111124   ; serial
				3600       ; refresh (1 hour)
				1800       ; retry (30 minutes)
				86400      ; expire (1 day)
				600        ; minimum (10 minutes)
				)

stts.ir.		30 IN TXT "v=spf1 mx a ip4:45.9.255.113 -all "

stts.ir.		30 IN A	5.144.130.89

Mail exchangers:
stts.ir.		30 IN MX 10 mail.stts.ir.

Name servers:
stts.ir.		30 IN NS ns3.stts.ir.
stts.ir.		30 IN NS ns2.stts.ir.