Trying to find a way to do this in cPanel v68.0.8.
Every answer I have found seems to refer back to the same old article:
https://web.archive.org/web/20110729131804/http://www.sant-media.co.uk:80/2010/03/how-to-configure-exim-to-receive-email-for-domain-only-from-specific-ip-addresses#more-360
Is there any CURRENT way to do this? CPanel doesn't use the
check_recipient ACL, apparently. It's not in our current config.
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