mx1.lsmod.de has no CNAME records.
Question and response
Question
dig mx1.lsmod.de. NS
Answer
The response has no answer records.
Authority
lsmod.de. 3563 SOA ns11.prosite.de. hostmaster.lsmod.de. 2026022601 10800 3600 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0