sender3-1.zohomail.com has no NS records.
NS records for this zone are defined at zohomail.com.
NS records for this zone are defined at zohomail.com.
Question and response
Question
dig sender3-1.zohomail.com. NS
Answer
The response has no answer records.
Authority
zohomail.com. 600 SOA NS1.ZOHOCORP.COM. dnsadmin.vtitan.com. 2026031100 7200 1800 1209600 3600
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0