mail-out.xifos.net has no MX records.
Question and response
Question
dig mail-out.xifos.net. MX
Answer
The response has no answer records.
Authority
xifos.net. 600 SOA ns1.xifos.net. admin.xifos.net. 2023021500 10800 3600 604800 600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0