> On Aug 21, 2018, at 12:31 PM, Fongaboo <[email protected]> wrote:
> 
> Awesome! Thanks...

This is probably solving the wrong problem.  Instead of exempting
these IP ranges from RBL checks, exempt all authenticated submission
clients from RBL checks.  Use port 587 for submission.  Keep the
RBL checks on port 25.

-- 
        Viktor.

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