functions/Get-DbaDbMailConfig.ps1

function Get-DbaDbMailConfig {
    <#
        .SYNOPSIS
            Gets database mail configs from SQL Server
 
        .DESCRIPTION
            Gets database mail configs from SQL Server
 
        .PARAMETER SqlInstance
            The SQL Server instance, or instances.
 
        .PARAMETER SqlCredential
            Login to the target instance using alternative credentials. Windows and SQL Authentication supported. Accepts credential objects (Get-Credential)
 
        .PARAMETER Name
            Specifies one or more config(s) to get. If unspecified, all configs will be returned.
 
        .PARAMETER InputObject
            Accepts pipeline input from Get-DbaDbMail
 
        .PARAMETER EnableException
            By default, when something goes wrong we try to catch it, interpret it and give you a friendly warning message.
            This avoids overwhelming you with "sea of red" exceptions, but is inconvenient because it basically disables advanced scripting.
            Using this switch turns this "nice by default" feature off and enables you to catch exceptions with your own try/catch.
 
        .NOTES
            Tags: databasemail, dbmail, mail
            Author: Chrissy LeMaire (@cl), netnerds.net
 
            Website: https://dbatools.io
            Copyright: (C) Chrissy LeMaire, clemaire@gmail.com
            License: MIT https://opensource.org/licenses/MIT
 
        .LINK
            https://dbatools.io/Get-DbaDbMailConfig
 
        .EXAMPLE
            PS C:\> Get-DbaDbMailConfig -SqlInstance sql01\sharepoint
 
            Returns DBMail configs on sql01\sharepoint
 
        .EXAMPLE
            PS C:\> Get-DbaDbMailConfig -SqlInstance sql01\sharepoint -Name ProhibitedExtensions
 
            Returns the ProhibitedExtensions configuration on sql01\sharepoint
 
        .EXAMPLE
            PS C:\> Get-DbaDbMailConfig -SqlInstance sql01\sharepoint | Select *
 
            Returns the DBMail configs on sql01\sharepoint then return a bunch more columns
 
        .EXAMPLE
            PS C:\> $servers = "sql2014","sql2016", "sqlcluster\sharepoint"
            PS C:\> $servers | Get-DbaDbMail | Get-DbaDbMailConfig
 
            Returns the DBMail configs for "sql2014","sql2016" and "sqlcluster\sharepoint"
    #>

    [CmdletBinding()]
    param (
        [Alias("ServerInstance", "SqlServer")]
        [DbaInstanceParameter[]]$SqlInstance,
        [Alias("Credential")]
        [PSCredential]$SqlCredential,
        [Alias("Config", "ConfigName")]
        [string[]]$Name,
        [Parameter(ValueFromPipeline)]
        [Microsoft.SqlServer.Management.Smo.Mail.SqlMail[]]$InputObject,
        [switch]$EnableException
    )
    process {
        foreach ($instance in $SqlInstance) {
            Write-Message -Level Verbose -Message "Connecting to $instance"
            $InputObject += Get-DbaDbMail -SqlInstance $SqlInstance -SqlCredential $SqlCredential
        }

        if (-not $InputObject) {
            Stop-Function -Message "No servers to process"
            return
        }

        foreach ($mailserver in $InputObject) {
            try {
                $configs = $mailserver.ConfigurationValues

                if ($Name) {
                    $configs = $configs | Where-Object Name -in $Name
                }

                $configs | Add-Member -Force -MemberType NoteProperty -Name ComputerName -value $mailserver.ComputerName
                $configs | Add-Member -Force -MemberType NoteProperty -Name InstanceName -value $mailserver.InstanceName
                $configs | Add-Member -Force -MemberType NoteProperty -Name SqlInstance -value $mailserver.SqlInstance
                $configs | Select-DefaultView -Property ComputerName, InstanceName, SqlInstance, Name, Value, Description
            }
            catch {
                Stop-Function -Message "Failure" -ErrorRecord $_ -Continue
            }
        }
    }
}