(Lianja) Transition from MailMan.MxLookup to Dns.Query

Provides instructions for replacing deprecated MxLookup method calls with the Chilkat Dns class.

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

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loMailman = createobject("CkMailMan")

// ...
// ...

lcEmailAddr = "joe@example.com"

// ------------------------------------------------------------------------
// The MxLookup method is deprecated:

lcDomain = loMailman.MxLookup(lcEmailAddr)
if (loMailman.LastMethodSuccess = .F.) then
    ? loMailman.LastErrorText
    release loMailman
    return
endif

// ------------------------------------------------------------------------
// Do the equivalent using the Chilkat DNS class

loDns = createobject("CkDns")

loJson = createobject("CkJsonObject")

// 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 loMailman
    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 loMailman
release loDns
release loJson