ISPconfig version: 3.1.2 I created DNS records by ISPconfig to get the DNS zone file, and then I deleted the zone and try import function, finally the NS records in the zone are missing and error as "Writing BIND domain file failed: /var/named/pri.abc.com zone abc.com/IN: has no NS records zone abc.com/IN: not loaded due to errors.". Below is the zone file content: Code: $TTL 3600 @ IN SOA ns1.def.com. test.test.com. ( 2017032201 ; serial, todays date + todays serial # 7200 ; refresh, seconds 540 ; retry, seconds 604800 ; expire, seconds 3600 ) ; minimum, seconds ; abc.com. 3600 TXT "v=spf1 mx a ~all" abc.com. 3600 MX 10 mail.abc.com. abc.com. 3600 NS ns1.def.com. abc.com. 3600 NS ns2.def.com. mail 3600 A 1.2.3.4 www 3600 A 1.2.3.4 abc.com. 3600 A 1.2.3.4
I just did a quick test with your zone file sample above, imported it in ISPConfig 3.1.13 and the NS records are there. You should update your ISPConfig to a recent version, your current version is nearly 2 years old.
