Overview

RBL, short for Realtime Blackhole List, is a list of IP addresses whose owners refuse to stop the proliferation of spam. The RBL usually lists server IP addresses from ISPs whose customers are responsible for the spam and from ISPs whose servers are hijacked for spam relay.

If you choose to use RBL's on your server, please limit the number of lists you query. This will impact the performance of your mail server.

Instructions

1. Log into your Plesk Server Administration Panel, see Figure 1:

   
   Figure 1: Server Administration Panel

2. From the left navigation menu, click on Settings.
3. Click on Mail Server Settings.
4. Uncheck the box labelled Switch on spam protection based on DNS blackhole lists, see Figure 2:

   
   Figure 2.

5. Click OK to save.

1. Log into your Plesk Control Panel.
2. Choose Server from the left panel.
3. Click on Mail under the Services section, see Figure 1:

   
   Figure 1.

4. Uncheck the box, if checked, next to Switch on spam protection based on DNS blackhole lists. You can optionally "blank out" any servers listed, but you might want to keep those for future use, should you wish to re-enable this service. See Figure 2:

   
   Figure 2.

5. Click OK at the bottom right to save your changes.