SharePoint 2010: Configure access request settings using Powershell

# Get All Web Application

$webApp=Get-SPWebApplication

   # Get All site collections

    foreach ($SPsite in $webApp.Sites)

    {

       # get the collection of webs

       foreach($SPweb in $SPsite.AllWebs)

        {

              # if a site inherits permissions, then the Access request mail setting also will be inherited

             if (!$SPweb.HasUniquePerm)

               {

                  Write-Host $SPweb.Name "Inheriting from Parent site"

               }

             elseif($SPweb.RequestAccessEnabled)

           {

        #Write-Host $SPweb.Name "Not Iheriting from Parent Site"

              $SPweb.RequestAccessEmail ="ram001@sample.com"

          $SPweb.Update()

           }

        }

    }

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