chadsdc6.ads.northwestern.edu has no MX records.
Question and response
Question
dig chadsdc6.ads.northwestern.edu. MX
Answer
The response has no answer records.
Authority
ads.northwestern.edu. 600 SOA infoblox.ittns.northwestern.edu. hostmaster.northwestern.edu. 166321031 14400 3600 604800 600
Additional
. 0 OPT ; payload 1220, xrcode 0, version 0, flags 0