relay.iland.net has no MX records.
Question and response
Question
dig relay.iland.net. MX
Answer
The response has no answer records.
Authority
iland.net. 900 SOA iland.net. root.iland.net. 2020032105 10800 3600 604800 86400
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0