we have "reject_non_fqdn_helo_hostname" but nothing similar for PTR's

well, one can argue the Regex below works just fine, but the would also be true for the HELO hostname - a small inconsistency
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Dec 4 17:35:27 localhost postfix/smtpd[10206]: NOQUEUE: reject: RCPT from unknown[46.32.250.248]: 554 5.7.1 <inboxBroker3>: Unverified Client host rejected: Generic DNS-Reverse-Lookup (PTR-Rule: 349) see http://www.emailtalk.org/ptr.aspx; from=<***> to=<***> proto=ESMTP helo=<ds-18554.ds-10.com>
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ptr-check.sh inboxBroker3
REJECT Generic DNS-Reverse-Lookup (PTR-Rule: 349)
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check_reverse_client_hostname_access:

cat postfix/blacklist_generic_ptr.cf | grep 349
/^[^.]+$/ REJECT Generic DNS-Reverse-Lookup (PTR-Rule: 349) see http://www.emailtalk.org/ptr.aspx

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