While working with one client I was getting below error in DNS
DNS error bad owner name (check-names) /tmp/cpanel
So I went ahead and checked DNS zone file using below command
root@vps [/var/named]# named-checkzone onlinecsource.com /var/named/onlinesource.com.db
/var/named/onlinesource.com.db:56: _autodiscover._tcp.cheapsalesleads.onlinesource.com: bad owner name (check-names)
/var/named/onlinesource.com.db:57: _autodiscover._tcp.cheapsalesleads.onlinesource.com: bad owner name (check-names)
zone onlinesource.com/IN: loaded serial 2017030209
OK
So the error pointed to line 56 and 57 in zone file
Went ahead and deleted the line 56 and 57 and reload DNS zone file
All works good now