mailin.snafu.de has no CNAME records.
Question and response
Question
dig mailin.snafu.de. NS
Answer
The response has no answer records.
Authority
snafu.de. 3315 SOA ns01.snafu.de. domain.team.snafu.de. 2026030502 86400 7200 604800 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0