mail.calpolyaias.org has no CNAME records.
Question and response
Question
dig mail.calpolyaias.org. NS
Answer
The response has no answer records.
Authority
calpolyaias.org. 1756 SOA dns.calpolyaias.org. hostmaster.calpolyaias.org. 1651593133 43200 3600 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0