There are many MAPS servers available in the Internet. A search on Google should return plenty of results. Note, that several issues are possible if you use MAPS SPAM protection:
- You should take caution in choosing a MAPS server as you can potentially block valid messages due to the rules of these servers.
- Configuring several MAPS server can affect mail delivery speed.
- If MAPS server stops to respond or responds incorrectly, it also can affect mail delivering speed or block incoming mail at all.