ntp.zaf.ca has no MX records.
Question and response
Question
dig ntp.zaf.ca. MX
Answer
The response has no answer records.
Authority
zaf.ca. 86400 SOA ns1.zafdns.ca. jeff.zaf.ca. 2025112601 3600 900 604800 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0