We have 3 mail enabled distribution groups as hr@mydomain.com ac@mydomain.com logs@mydomain.com We have now created a new distribution group it@mydomain.com , the members of this domain are user1@mydomain.com user2@mydomain.com user3@mydomain.com We need to enable delivery restrictions to this email as below 1. Only accept messages from User1, User2 & User3 hr logs Any mails from user4, ac@mydomain.com must be rejected. any mails from external domains like hotmail, gmail etc must also be rejected. someone please help me resolve this. thank you in advance. philip

You can go to the Properties of the distribution group in exchange >> then go to Mailflow settings >> Go to Message Delivery Restrictions : there you can set acceptance or rejection , internally as well as external. to check the option - requires that all sender are authticated means whoever is not authenticated as per your domain will not be able to send the message to that particular DL. For more info -http://technet.microsoft.com/en-us/library/bb124405.aspx#MDRestrictions

Hi, I have a similar situation. Now we unchecked the checkbox for Require that all senders are authenticated to receive the outside user. Now Boss asked me if I can find the emails from the outside users before allowing the outside user. Is it possible to find and retrieve the messages from outside users which had been restricted before being allowed? if then, How can I get those??? Thanks.