spf-era.mailtarget.dev has no CNAME records.
Question and response
Question
dig spf-era.mailtarget.dev. NS
Answer
The response has no answer records.
Authority
mailtarget.dev. 218 SOA karl.ns.cloudflare.com. dns.cloudflare.com. 2397219140 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0