np4.schwab.com has no MX records.
Question and response
Question
dig np4.schwab.com. MX
Answer
The response has no answer records.
Authority
schwab.com. 600 SOA d33pe2bdc.schwab.com. dnsadmin.schwab.com. 2023022029 3600 900 604800 600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0