|The Exchange 2007 mail server does not accept the
sending of mail from non-authenticated users in the standard configuration. If the
sending of mail from non-authenticated users is to be enabled, the
following command must be entered in the Exchange shell:
Get-ReceiveConnector "CONNECTORNAME" | Add-ADPermission-User "NT AUTHORITYANONYMOUS LOGON" -ExtendedRights "ms-Exch-SMTP-Accept-Any-Recipient"
The placeholder CONNECTORNAME must be adjusted for the infrastructure of the customer in this case. The user NT AUTHORITYANONYMOUS LOGON can also vary, depending on operating system and language.