prod.spf.datto.com has no MX records.
Question and response
Question
dig prod.spf.datto.com. MX
Answer
The response has no answer records.
Authority
datto.com. 300 SOA a1-24.akam.net. a10-65.akam.net. 2024122473 28800 7200 604800 86400
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0