smtp.celestemail.com has no TXT records.
Question and response
Question
dig smtp.celestemail.com. TXT
Answer
The response has no answer records.
Authority
celestemail.com. 3600 SOA ns1.celeste.fr.celestemail.com. support.celeste.fr. 2024100301 3600 900 604800 3600
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0