dreamhostps.com has no MX records.
Question and response
Question
dig dreamhostps.com. MX
Answer
The response has no answer records.
Authority
dreamhostps.com. 300 SOA ns1.dreamhost.com. hostmaster.dreamhost.com. 2026022208 1710 1800 1209600 300
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0