(PowerShell) DNS Query MX Records

See more DNS Examples

Shows how to perform a DNS query to retrieve MX records.

Note: This example requires Chilkat v9.5.0.96 or later.

Chilkat .NET Downloads Chilkat .NET Assemblies

Add-Type -Path "C:\chilkat\ChilkatDotNet47-9.5.0-x64\ChilkatDotNet47.dll"

$dns = New-Object Chilkat.Dns

$json = New-Object Chilkat.JsonObject
$json.EmitCompact = $false

$success = $dns.Query("MX","somebody@gmail.com",$json)
if ($success -eq $false) {
    $($dns.LastErrorText)
    exit
}

$($json.Emit())

# Sample response.
# Parsing code below..

# -------------------------------------------------------------------------------
# Note: Chilkat will return the results sorted by "pref" from lowest to highest.
# -------------------------------------------------------------------------------

# {
#   "answer": {
#     "mx": [
#       {
#         "name": "gmail.com",
#         "ttl": 491,
#         "pref": 5,
#         "domain": "gmail-smtp-in.l.google.com"
#       },
#       {
#         "name": "gmail.com",
#         "ttl": 491,
#         "pref": 10,
#         "domain": "alt1.gmail-smtp-in.l.google.com"
#       },
#       {
#         "name": "gmail.com",
#         "ttl": 491,
#         "pref": 20,
#         "domain": "alt2.gmail-smtp-in.l.google.com"
#       },
#       {
#         "name": "gmail.com",
#         "ttl": 491,
#         "pref": 30,
#         "domain": "alt3.gmail-smtp-in.l.google.com"
#       },
#       {
#         "name": "gmail.com",
#         "ttl": 491,
#         "pref": 40,
#         "domain": "alt4.gmail-smtp-in.l.google.com"
#       }
#     ]
#   }
# }

# Use this online tool to generate parsing code from sample JSON: 
# Generate Parsing Code from JSON

$i = 0
$count_i = $json.SizeOfArray("answer.mx")
while ($i -lt $count_i) {
    $json.I = $i
    $name = $json.StringOf("answer.mx[i].name")
    $ttl = $json.IntOf("answer.mx[i].ttl")
    $pref = $json.IntOf("answer.mx[i].pref")
    $domain = $json.StringOf("answer.mx[i].domain")
    $i = $i + 1
}