bill.vps1.net has no MX records.
Question and response
Question
dig bill.vps1.net. MX
Answer
The response has no answer records.
Authority
vps1.net. 5999 SOA vps1.net. info.di.city. 2024081672 10800 3600 604800 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0