Question and response
Question
dig booster._domainkey.express-mailing.com. NS
Answer
booster._domainkey.express-mailing.com. 5 CNAME booster.express-mailing.com.dkim.express-mail.com.
Authority
express-mail.com. 300 SOA x.ns.joker.com. hostmaster.joker.com. 2026031757 14400 3600 1209600 300
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0