envelope.cct.lsu.edu has no CNAME records.
Question and response
Question
dig envelope.cct.lsu.edu. NS
Answer
The response has no answer records.
Authority
cct.lsu.edu. 3600 SOA lsu-bdds1.lsu.edu. postmaster.no.email.please. 789631332 3600 600 2592000 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0