apptocloud.net has no MX records.
Question and response
Question
dig apptocloud.net. MX
Answer
The response has no answer records.
Authority
apptocloud.net. 10800 SOA dns1.ttc.cz.apptocloud.net. admin.apptocloud.net. 2026022008 10800 3600 777600 3600
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0