mehrnetwork.ir.		30 IN SOA a.ns.arvancdn.ir. hostmaster.arvancloud.ir. (
				1767875410 ; serial
				86400      ; refresh (1 day)
				7200       ; retry (2 hours)
				604800     ; expire (1 week)
				7200       ; minimum (2 hours)
				)

mehrnetwork.ir.		30 IN TXT "v=spf1 mx a ptr ~all"

Mail exchangers:
mehrnetwork.ir.		30 IN MX 1 mail.mehrnetwork.ir.

Name servers:
mehrnetwork.ir.		30 IN NS a.ns.arvancdn.ir.
mehrnetwork.ir.		30 IN NS o.ns.arvancdn.ir.