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I am doing test at mxtoolbox.com
ptr: ip -> mydomain.com
mx: mydomain.com ->myip
but smtp:184.108.40.206 -> OK - myip resolves to myip.hosted.static.hostingfirm.com / Warning - Reverse DNS does not match SMTP Banner
at my dns, i have for mydomain forward zone
(same as parent folder) Host(A) myip
(same as parent folder) Mail Exchanger(MX) on mydomain.com.
and for reverse lookup
myip Pointer(PTR) mydomain.com.
what am I missing then at stmp test, reverse dns fails?