smtp.acctn.com.ph has no MX records.
Question and response
Question
dig smtp.acctn.com.ph. MX
Answer
The response has no answer records.
Authority
acctn.com.ph. 2560 SOA a.ns.acctn.com.ph. hostmaster.acctn.com.ph. 2020090602 10800 3600 604800 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0