mail4.intuit.com has no MX records.
Question and response
Question
dig mail4.intuit.com. MX
Answer
The response has no answer records.
Authority
intuit.com. 300 SOA dns1.p08.nsone.net. nadmin.intuit.com. 1657129353 1800 1800 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0