Blogpost - Get-MailDomainInfo function for retrieving all email DNS records
Wrote a blogpost about it, but this is the Function I made to get all the email dns records in a convenient way. (Saves time querying mxtoolbox.com 😉 ) function Get-MailDomainInfo { param( [parameter(Mandatory = $true)][string]$DomainName, [parameter(Mandatory = $false)][string]$DNSserver ) #Use DNS server 1.1.1.1 when parameter DNSserver is not used if (-not ($DNSserver)) { $DNSserver = '1.1.1.1' } #Retrieve all mail DNS records $autodiscoverA = (Resolve-DnsName -Name "autodiscover.$($domainname)" -Type A -Server $DNSserver -ErrorAction SilentlyContinue).IPAddress $autodiscoverCNAME = (Resolve-DnsName -Name "autodiscover.$($domainname)" -Type CNAME -Server $DNSserver -ErrorAction SilentlyContinue).NameHost $dkim1 = Resolve-DnsName -Name "selector1._domainkey.$($domainname)" -Type CNAME -Server $DNSserver -ErrorAction SilentlyContinue $dkim2 = Resolve-DnsName -Name "selector2._domainkey.$($domainname)" -Type CNAME -Server $DNSserver -ErrorAction SilentlyContinue $domain = Resolve-DnsName -Name $DomainName -Server $DNSserver -ErrorAction SilentlyContinue $dmarc = (Resolve-DnsName -Name "_dmarc.$($DomainName)" -Type TXT -Server $DNSserver -ErrorAction SilentlyContinue).Strings $mx = (Resolve-DnsName -Name $DomainName -Type MX -Server $DNSserver -ErrorAction SilentlyContinue).NameExchange $spf = (Resolve-DnsName -Name $DomainName -Type TXT -Server $DNSserver -ErrorAction SilentlyContinue | Where-Object Strings -Match 'v=spf').Strings #Set variables to Not enabled or found if they can't be retrieved #and stop script if domainname is not valid $errorfinding = 'Not enabled' if ($null -eq $domain) { Write-Warning ("{0} not found" -f $DomainName) return } if ($null -eq $dkim1 -and $null -eq $dkim2) { $dkim = $errorfinding } else { $dkim = "$($dkim1.Name) , $($dkim2.Name)" } if ($null -eq $dmarc) { $dmarc = $errorfinding } if ($null -eq $mx) { $mx = $errorfinding } if ($null -eq $spf) { $spf = $errorfinding } if (($autodiscoverA).count -gt 1) { $autodiscoverA = $errorfinding } if ($null -eq $autodiscoverCNAME) { $autodiscoverCNAME = $errorfinding } $info = [PSCustomObject]@{ 'Domain Name' = $DomainName 'Autodiscover IP-Address' = $autodiscoverA 'Autodiscover CNAME ' = $autodiscoverCNAME 'DKIM Record' = $dkim 'DMARC Record' = "$($dmarc)" 'MX Record(s)' = $mx -join ', ' 'SPF Record' = "$($spf)" } return $info } (https://powershellisfun.com)
