mx.uniforms-i.com has no CNAME records.
Question and response
Question
dig mx.uniforms-i.com. NS
Answer
The response has no answer records.
Authority
uniforms-i.com. 3229 SOA dns.uniforms-i.com. hostmaster.uniforms-i.com. 1758148961 43200 3600 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0