web01c.saremail.com has no CNAME records.
Question and response
Question
dig web01c.saremail.com. NS
Answer
The response has no answer records.
Authority
saremail.com. 149 SOA ns1.sarenet.es. dnsmaster.sarenet.es. 2025112407 86400 7200 2592000 300
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0