pwc.net.do has no MX records.
Question and response
Question
dig pwc.net.do. MX
Answer
The response has no answer records.
Authority
pwc.net.do. 3600 SOA dns1.cscdns.net. hostmaster.cscdns.net. 200306120 10800 86400 604800 3600
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0