smtpretry2.9services.com has no MX records.
Question and response
Question
dig smtpretry2.9services.com. MX
Answer
The response has no answer records.
Authority
9services.com. 3600 SOA ns1.9services.com. hostmaster.9services.com. 2008051998 3600 3600 604800 3600
Additional
. 0 OPT ; payload 4000, xrcode 0, version 0, flags 0