WHM Blacklist queries

Hello

I have a dual Xeon running WHM. Would anyone let me know the following:

1. Does leaving boxtrapper ON create any blacklisting issues or other problems?

2. How to find out if reverse DNS has been setup correctly (to prevent getting blacklisted)?

3. Whis is the best (but not over aggresive) free blacklist to use for Exim conf?

Thanks

 

 

 

 

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