comms.rice.edu has no MX records.
Question and response
Question
dig comms.rice.edu. MX
Answer
The response has no answer records.
Authority
comms.rice.edu. 900 SOA ns1.rice.edu. hostmaster.rice.edu. 135 10800 3600 2419200 900
Additional
. 0 OPT ; payload 1220, xrcode 0, version 0, flags 0