mail.saipan.com has no CNAME records.
Question and response
Question
dig mail.saipan.com. NS
Answer
The response has no answer records.
Authority
saipan.com. 3600 SOA NS.guam.net. HostMaster.ns.guam.net. 2025091103 3600 3600 3600 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0