www3.pcdc.net has no MX records.
Question and response
Question
dig www3.pcdc.net. MX
Answer
The response has no answer records.
Authority
pcdc.net. 14440 SOA ns1.pcdc.net. admin.prioritycolo.com. 2026010100 28800 7200 3600000 86400
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0