How to create an authenticated SMTP in Exchange 2013

In this article, I described how to create an authenticated SMTP in Exchange 2007/2010: http://www.itxperience.net/come-creare-un-smtp-autenticato-in-exchange/

On exchange 2013 the procedure is similar…. but with a small difference! In addition to the configuration that you can find in the article that I linked, you have to make a further change: you have to run the command

Get-ReceiveConnector "Name of the connector" | Add-ADPermission -ExtendedRights:ms-Exch-SMTP-Accept-Any-Sender -user “NT AUTHORITYAuthenticated Users”

Also on the connector labeled “Client proxy servername”