How to decrease the risk of outgoing spam in Plesk for Windows Server with MailEnable

Question

How to decrease the risk of outgoing spam in Plesk for Windows Server with MailEnable?

Answer

1. Log in to Plesk.

2. Remove the localhost records from the white list:

   2.1. Go to Tools & Settings > Mail Server Settings > White List tab.

   2.2. Select 127.0.0.1/8 (or 127.0.0.1/32) and ::1/128.

   2.3. Click Remove.

3. Enforce SMTP authentication:

   3.1. Go to Tools & Settings > Mail Server Settings > Relay options >.

   3.2. Select authorization is required and check SMTP.

   3.3. Apply the changes.

4. Connect to the Plesk server via RDP.

5. Disable the setting Authenticated senders must use address from their postoffice in MailEnable:

   5.2. Start MailEnable Management console at Windows Start > All Programs > MailEnable.

   5.3. In MailEnable Management console, expand Servers > localhost > Services and Connectors > right-click on SMTP to open its Properties.

   5.4. In SMTP Properties window, switch to the Security tab and disable the setting Authenticated senders must use address from their postoffice

   

6. Disable Allow relay for privileged IP ranges.

   6.1. In MailEnable Management console, expand Servers > localhost > Services and Connectors > right-click on SMTP and open its Properties.

   6.2. In SMTP Properties window, switch to the Relay tab and uncheck the option Allow relay for privileged IP ranges if it was enabled.

   

7. Restart the MailEnable SMTP Connector service:

   7.1. In MailEnable Management console, go to Servers > localhost > System > Services Status.

   7.2. Select MailEnable SMTP Connector.

   7.3. Click Restart in the right pane.