pendragon.cs.purdue.edu has no MX records.
Question and response
Question
dig pendragon.cs.purdue.edu. MX
Answer
The response has no answer records.
Authority
cs.purdue.edu. 10800 SOA pendragon.cs.purdue.edu. postmaster.cs.purdue.edu. 2026022015 10800 3600 604800 10800
Additional
. 0 OPT ; payload 1220, xrcode 0, version 0, flags 0