Resolve-DomainDNS.ps1
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Script
function Get-DMARCRecord {
<#
.SYNOPSIS
Get DMARC Record for a domain.
.DESCRIPTION
This function uses Resolve-DNSName to get the DMARC Record for a given domain. Objects with a DomainName property,
such as returned by Get-AcceptedDomain, can be piped to this function.
.EXAMPLE
Get-AcceptedDomain | Get-DMARCRecord
This example gets DMARC records for all domains returned by Get-AcceptedDomain.
#>
[CmdletBinding(HelpUri = 'https://ntsystems.it/PowerShell/TAK/Get-DMACRecord/')]
param (
# Specify the Domain name to use for the query.
[Parameter(Mandatory = $true,
ValueFromPipelineByPropertyName = $true,
ValueFromPipeline = $true)]
[string]
$DomainName,
# Specify a DNS server to query.
[string]
$Server
)
process {
$params = @{
Name = "_dmarc.$DomainName"
ErrorAction = "SilentlyContinue"
}
if ($Server) { $params.Add("Server", $Server) }
$dnsTxt = Resolve-DnsName @params -Type TXT | Where-Object Type -eq TXT
$dnsTxt | Select-Object @{Name = "DMARC"; Expression = { "$DomainName`:$s" } }, @{Name = "Record"; Expression = { $_.Strings } }
}
}
function Get-DKIMRecord {
<#
.SYNOPSIS
Get DKIM Record for a domain.
.DESCRIPTION
This function uses Resolve-DNSName to get the DKIM Record for a given domain. Objects with a DomainName property,
such as returned by Get-AcceptedDomain, can be piped to this function. The function defaults to "selector1" as this
is typically used with Exchange Online.
.EXAMPLE
Get-AcceptedDomain | Get-DKIMRecord
This example gets DKIM records for all domains returned by Get-AcceptedDomain.
#>
[CmdletBinding(HelpUri = 'https://ntsystems.it/PowerShell/TAK/Get-DKIMRecord/')]
param (
# Specify the Domain name to use in the query.
[Parameter(Mandatory = $true,
ValueFromPipelineByPropertyName = $true,
ValueFromPipeline = $true)]
[string]
$DomainName,
# Specify a selector name to use in the query.
[Parameter()]
[string[]]
$Selector,
# Specify a DNS server to query.
[Parameter()]
[string]
$Server
)
process {
foreach ($name in $Selector) {
$params = @{
Name = "$name._domainkey.$DomainName"
ErrorAction = "SilentlyContinue"
}
if ($Server) { $params.Add("Server", $Server) }
$dnsTxt = Resolve-DnsName @params -Type TXT | Where-Object Type -eq TXT
$dnsTxt | Select-Object @{Name = "DKIM"; Expression = { "$DomainName`:$s" } }, @{Name = "Record"; Expression = { $_.Strings } }
}
}
}
function Get-SPFRecord {
<#
.Synopsis
Get SPF Record for a domain.
.DESCRIPTION
This function uses Resolve-DNSName to get the SPF Record for a given domain. Objects with a DomainName property,
such as returned by Get-AcceptedDomain, can be piped to this function.
.EXAMPLE
Get-AcceptedDomain | Get-SPFRecord
This example gets SPF records for all domains returned by Get-AcceptedDomain.
#>
[CmdletBinding(HelpUri = 'https://ntsystems.it/PowerShell/TAK/Get-SPFRecord/')]
param (
# Specify the Domain name for the query.
[Parameter(Mandatory = $true,
ValueFromPipelineByPropertyName = $true,
ValueFromPipeline = $true)]
[string]
$DomainName,
# Specify the Domain name for the query.
[string]
$Server
)
process {
$params = @{
Type = "txt"
Name = $DomainName
ErrorAction = "Stop"
}
if ($Server) { $params.Add("Server", $Server) }
try {
$dns = Resolve-DnsName @params | Where-Object Strings -Match "spf1"
$dns | Select-Object @{Name = "DomainName"; Expression = { $_.Name } }, @{Name = "Record"; Expression = { $_.Strings } }
}
catch {
Write-Warning $_
}
}
}
Resolve-DnsName -Name $env:USERDOMAIN -Type A -Server 8.8.8.8 -ErrorAction Stop
Get-SPFRecord -DomainName example.co.uk -Server 8.8.4.4 -ErrorAction Stop
Get-DMARCRecord -DomainName example.co.uk -Server 8.8.8.8 -ErrorAction Stop
Get-DKIMRecord -DomainName example.co.uk -Server 8.8.8.8 -ErrorAction Stop
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