Question and response
Question
dig sf2._domainkey.ubermetrics.com. NS
Answer
sf2._domainkey.ubermetrics.com. 5 CNAME sf2.usqe4d.custdkim.salesforce.com.
Authority
custdkim.salesforce.com. 30 SOA mastername.salesforce.com. hostmaster.salesforce.com. 2041161308 1800 900 2592000 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0