lufgrelay.taleo.net has no MX records.
Question and response
Question
dig lufgrelay.taleo.net. MX
Answer
The response has no answer records.
Authority
taleo.net. 300 SOA ns1.p201.dns.oraclecloud.net. hostmaster.taleo.net. 598322820 3600 600 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0