mail.thoughtindustries.com has no NS records.
NS records for this zone are defined at thoughtindustries.com.
NS records for this zone are defined at thoughtindustries.com.
Question and response
Question
dig u807214.wl215.sendgrid.net. NS
Answer
The response has no answer records.
Authority
wl215.sendgrid.net. 1800 SOA aisha.ns.cloudflare.com. dns.cloudflare.com. 2398632776 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0