mailout.s4financials.com has no MX records.
Question and response
Question
dig mailout.s4financials.com. MX
Answer
The response has no answer records.
Authority
s4financials.com. 100 SOA ns-v.dns.yourhosting.nl. hostmaster.firstfind.nl. 2026012105 16384 2048 1048576 14400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0