smtp1o.xnet.ro has no MX records.
Question and response
Question
dig smtp1o.xnet.ro. MX
Answer
The response has no answer records.
Authority
xnet.ro. 900 SOA ns01.vodafonenet.ro. dnsadmin_ro.vodafone.com. 2020061624 10800 3600 2419200 900
Additional
. 0 OPT ; payload 1220, xrcode 0, version 0, flags 0