mail2.handles.de has no CNAME records.
Question and response
Question
dig mail2.handles.de. NS
Answer
The response has no answer records.
Authority
handles.de. 3600 SOA dns.dns1.de. hostmaster.partnergate.com. 2024052305 28800 7200 604800 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0