mx.zeptomail.ca has no MX records.
Question and response
Question
dig mx.zeptomail.ca. MX
Answer
The response has no answer records.
Authority
zeptomail.ca. 600 SOA ns11.zns-53.com. dnsadmin.vtitan.com. 2026020700 7200 1800 1209600 1800
Additional
. 0 OPT ; payload 1280, xrcode 0, version 0, flags 0