stbancorp.com has no MX records.
Question and response
Question
dig stbancorp.com. MX
Answer
The response has no answer records.
Authority
stbancorp.com. 3600 SOA NS45.WORLDNIC.com. namehost.WORLDNIC.com. 122121611 10800 3600 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0