sdm1.quickbooks.net has no MX records.
Question and response
Question
dig sdm1.quickbooks.net. MX
Answer
The response has no answer records.
Authority
quickbooks.net. 300 SOA dns1.p01.nsone.net. nadmin.intuit.com. 1646333138 10800 3600 604800 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0