s3.cmg1.smtp.forpsi.com has no MX records.
Question and response
Question
dig s3.cmg1.smtp.forpsi.com. MX
Answer
The response has no answer records.
Authority
forpsi.com. 3600 SOA ns.forpsi.net. admin.forpsi.net. 2026022701 14400 3600 2592000 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0