tps.sfr.net has no MX records.
Question and response
Question
dig tps.sfr.net. MX
Answer
The response has no answer records.
Authority
tps.sfr.net. 86400 SOA nspriprov.dns.sfr.net. support.dns.sfr.net. 2016122000 10800 3600 1814400 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0