We are unfortunate enough to get ourselves listed here a week or
so ago and they want to charge 50E$ to become unlisted but we
refuse to pay as we feel it's outright extortion.

-> http://www.backscatterer.org/?target=usage

I've been using these settings for years, bofh has...

opt BOFHSUPPRESSBACKSCATTER=smtp,authsmtp

and courierd has...

ESMTP_BLOCKBACKSCATTER=smtp/dsn,authsmtp/dsn

Am I missing anything to prevent any/all backscatter in the future?

--markc

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