Is there anyway to accomplish the above at the firewall - we are using ISA? We are receiving ton of messages with anything left of the @. Some of the recipients: jkyxpzbjzqkli@xxxxxxxxx lggxxtpghdx@xxxxxxxxx jxbhwutklun@xxxxxxxxx Is there a way to extend Recipient Filtering to the firewall? TIA greg All mail to and from this domain is scrutinized by the Scrutinizer.