spf.ntt.eu has no MX records.
Question and response
Question
dig spf.ntt.eu. MX
Answer
The response has no answer records.
Authority
ntt.eu. 600 SOA ns0.ci.nttsvc.com. hostmaster.ntt.eu. 1772047334 16384 2048 1048576 2560
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0