1$TTL 3600 2@ IN SOA ns.otptest. lsa.otptest. ( 3 1 ; serial 4 60 ; refresh 5 10 ; retry 6 300 ; expiry 7 30 ) ; minimum 8 9 IN NS ns.otptest. 10 IN MX 10 mx.otptest. 11 121 IN PTR test1-78901234567890123456789012345678.otptest. 132 IN PTR test2-78901234567890123456789012345678.otptest. 1410 IN PTR mx.otptest. 1511 IN PTR ns1-5678901234567890123456789012345678.otptest. 1612 IN PTR ns2-5678901234567890123456789012345678.otptest. 1721 IN PTR mx1-5678901234567890123456789012345678.otptest. 1822 IN PTR mx2-5678901234567890123456789012345678.otptest. 1923 IN PTR mx3-5678901234567890123456789012345678.otptest. 2024 IN PTR mx4-5678901234567890123456789012345678.otptest. 2125 IN PTR mx5-5678901234567890123456789012345678.otptest. 2226 IN PTR mx6-5678901234567890123456789012345678.otptest. 2327 IN PTR mx7-5678901234567890123456789012345678.otptest. 24 2528 IN PTR resolve.otptest. 26 27254 IN PTR ns.otptest. 28