ideco.dev has no MX records.
Question and response
Question
dig ideco.dev. MX
Answer
The response has no answer records.
Authority
ideco.dev. 3600 SOA ns1.yandexcloud.net. mx.cloud.yandex.net. 1 10800 900 604800 86400
Additional
. 0 OPT ; payload 1024, xrcode 0, version 0, flags 0