duo.rs.			30 IN SOA ns1.duohost.net. hostmaster.duo.rs. (
				2026050803 ; serial
				3600       ; refresh (1 hour)
				3600       ; retry (1 hour)
				1209600    ; expire (2 weeks)
				86400      ; minimum (1 day)
				)

duo.rs.			30 IN TXT "v=spf1 a mx ip4:185.225.232.99 -all"

duo.rs.			30 IN A	185.225.232.99

Mail exchangers:
duo.rs.			30 IN MX 10 mail.duo.rs.

Name servers:
duo.rs.			30 IN NS ns2.duohost.net.
duo.rs.			30 IN NS ns1.duohost.net.