eesmtp3.intl.verizon.com has no MX records.
Question and response
Question
dig eesmtp3.intl.verizon.com. MX
Answer
The response has no answer records.
Authority
intl.verizon.com. 1800 SOA ns.emea.verizonbusiness.com. hostmaster.emea.verizonbusiness.com. 2025081301 28800 7200 2678400 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0