how can I enable sender/recipient white lists (only permitted senders and only permitted recipients)? something like sendmail's access.db or virtusertable.

Hi, To do so, please perform the following steps: 1. Opening IIS 6.0 Manager under Administrative Tools -> Internet Information Services 6.0, select the SMTP virtual server, and then click Properties on the Action menu. 2. On the Access tab, under Relay restrictions, click Relay. The Relay Restrictions dialog box will open. 3. Click either Only the list below or All except the list below. 4. Click Add to open the Computer dialog box and add exceptions to the global access option that you chose. 5. You can specify the following options in the Relay Restrictions dialog box. Option Description: ================ (1)Only the list below Only the computers in the list can relay messages through the SMTP virtual server. This is set by default, together with Allow all computers which successfully authenticate to relay, regardless of the list above. Because the list is blank upon a fresh installation of Windows Server 2008, this means only authenticated users can relay mail by default. (2)All except the list below All computers can relay messages through the SMTP virtual server, except those in the list. (3)Add and Remove This option adds and removes entries to the list of those computers either granted or denied relay access. (4)Allow all computers which successfully authenticate to relay, regardless of the list above This option allows computers that meet authentication requirements set in the Authentication dialog box to relay messages to the SMTP virtual server. This is set by default. ========== You can define the corresponding policy to restrict the "from" email address For more information, please refer to the Help document of SMTP server itself. Sincerely, Wilson JiaThis posting is provided "AS IS" with no warranties, and confers no rights. Please click "Mark as Answer" when you get the correct reply to your question.

========== You can define the corresponding policy to restrict the "from" email address For more information, please refer to the Help document of SMTP server itself. Sincerely, Wilson Jia This posting is provided "AS IS" with no warranties, and confers no rights. Please click "Mark as Answer" when you get the correct reply to your question. yes, I would like to restrict From/To addresses (not IP addresses), where can I read about it ?