mail.topsaas.net has no MX records.
Question and response
Question
dig mail.topsaas.net. MX
Answer
The response has no answer records.
Authority
topsaas.net. 3600 SOA pdns.binat.net.il. dns.qos.net.il. 2026021900 10800 3600 604800 38400
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0