s04-gw101.domainlocalhost.com has no MX records.
Question and response
Question
dig s04-gw101.domainlocalhost.com. MX
Answer
The response has no answer records.
Authority
domainlocalhost.com. 3600 SOA ns1.mycloudmailbox.com. admin\@sherweb.com. 55587 1800 300 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0