Trying to set up a Delivery Restriction on Exchange 2003 I had one mailbox with two email address support@companya.com & mail@companya.com We want to stop all emails being delivery from Postmaster@companyB.com that goes to mail@companyA.com BUT we DON'T want to restrict emails from Postmaster@companyB.com that goes to support@companyA.com. I made a contact with the stmp address of Postmaster@companyB.com I then remove the email address mail@companyA.com from the above user I thought the best option would be to set up another mailbox with the email address of mail@companya.com, under the "Exchange General" tab I select "Delivery Restrictions" and clicked "Accept messages from everyone expect" added the new user for postmaster@companyB.com. Next I went to delivery options and choose the forward to option and select the user that had the email support@companyA.com I thought this would have work e.g. Emails to mail@companyA.com would come into the exchange system, emails from postmaster@companyB.com would be stripped out then the rest would be sent to support@companyA.com This does not seem to be stripping out the emails from postmaster@companyB.com going to mail@companyA.com , does anyone have any idea how to achieve this????

Hi , I think it is impossible to block an external sender at user level, You could only block an external sender at server level. You could do it only via Outlook rules. 1. Create a new mailbox mail@companyA.com 2. Create an Outlook rules for mail@companyA.com Condition: all the message arrives Actions: forward to support@companyA.com Except with: Postmaster@companyB.com in the recipient’s address Please remember to click Mark as Answer on the post that helps you, and to click Unmark as Answer if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread.