ns2.ppspf.net has no MX records.
Question and response
Question
dig ns2.ppspf.net. MX
Answer
The response has no answer records.
Authority
ppspf.net. 86400 SOA ns1.ppspf.net. Postmaster.ppspf.net. 343708809 10800 3600 172800 86400
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0