(Lianja) MX Lookup Mail Server Domain by Email Address

How to find the mail server for a given email address. Returns the domain name of the primary mail server.

Note: This example requires Chilkat v11.0.0 or greater.

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llSuccess = .F.

// This example requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

loDns = createobject("CkDns")
loJson = createobject("CkJsonObject")

lcEmailAddr = "bob@example.com"

// This gets all MX domains for an email address.  (Typically one domain.)
// The preferred domain will be at index 0 (see below).
llSuccess = loDns.Query("MX",lcEmailAddr,loJson)
if (llSuccess = .F.) then
    ? loDns.LastErrorText
    release loDns
    release loJson
    return
endif

i = 0
lnCount_i = loJson.SizeOfArray("answer.mx")
do while i < lnCount_i
    loJson.I = i
    lcDomain = loJson.StringOf("answer.mx[i].domain")
    ? lcDomain
    i = i + 1
enddo


release loDns
release loJson