ovro-net.ovro.caltech.edu has no MX records.
Question and response
Question
dig ovro-net.ovro.caltech.edu. MX
Answer
The response has no answer records.
Authority
ovro.caltech.edu. 300 SOA ovro.ovro.caltech.edu. hostmaster.ovro.caltech.edu. 2022052400 600 300 3600000 300
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0