Question and response
Question
dig smtp.tng.de. NS
Answer
smtp.tng.de. 5 CNAME smtp.mailcluster.tng.de.
Authority
tng.de. 1334 SOA ns1.ennit.net. hostmaster.tng.de. 2026022601 14400 1800 3600000 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0