postfix.technomedia.fr has no TXT records.
Question and response
Question
dig postfix.technomedia.fr. TXT
Answer
The response has no answer records.
Authority
technomedia.fr. 180 SOA ns0.dnsmadeeasy.com. dns.dnsmadeeasy.com. 2008010245 43200 3600 1209600 180
Additional
. 0 OPT ; payload 1280, xrcode 0, version 0, flags 0