spamwall2-5.vistec.net has no MX records.
Question and response
Question
dig spamwall2-5.vistec.net. MX
Answer
The response has no answer records.
Authority
vistec.net. 120 SOA ns.vistec.com. root.ns.vistec.com. 2026020401 7200 7200 1209600 120
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0