sys.i3d.network has no MX records.
Question and response
Question
dig sys.i3d.network. MX
Answer
The response has no answer records.
Authority
sys.i3d.network. 3595 SOA ns1.i3d.nl. nes.i3d.net. 2026022601 43200 7200 2419200 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0