mailrelay.t1cloud.com has no NS records.
NS records for this zone are defined at t1cloud.com.
NS records for this zone are defined at t1cloud.com.
Question and response
Question
dig mailrelay.t1cloud.com. NS
Answer
The response has no answer records.
Authority
t1cloud.com. 900 SOA ns-1774.awsdns-29.co.uk. awsdns-hostmaster.amazon.com. 1 7200 900 1209600 300
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0