mail.focolare.org has no CNAME records.
Question and response
Question
dig mail.focolare.org. NS
Answer
The response has no answer records.
Authority
focolare.org. 3600 SOA NS67.WORLDNIC.COM. namehost.WORLDNIC.COM. 126022510 10800 3600 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0