wtf has no MX records.
Question and response
Question
dig wtf. MX
Answer
The response has no answer records.
Authority
wtf. 3600 SOA v0n0.nic.wtf. hostmaster.donuts.email. 1771781744 7200 900 1209600 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0