Question and response
Question
dig mailer0.gate85.rs.smtp.com. A
Answer
mailer0.gate85.rs.smtp.com. 3600 A 74.91.85.0
Authority
rs.smtp.com. 3600 NS ns-1435.awsdns-51.org.
rs.smtp.com. 3600 NS ns-1663.awsdns-15.co.uk.
rs.smtp.com. 3600 NS ns-209.awsdns-26.com.
rs.smtp.com. 3600 NS ns-574.awsdns-07.net.
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0