Q: smtpd_recipient_restrictions w/reject_unlisted_recipient,

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Q: smtpd_recipient_restrictions w/reject_unlist...
\ MrC (28 Mar 2008)
. \ mouss (28 Mar 2008)
. . \ MrC (28 Mar 2008)
. . . \ Charles Marcus (30 Mar 2008)
. . . . \ MrC (30 Mar 2008)

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Subject:	Q: smtpd_recipient_restrictions w/reject_unlisted_recipient,
Group:	Postfix-users
From:	MrC
Date:	28 Mar 2008

Postfix 2.6-20080221

I have smtpd_recipient_restrictions as follows:

smtpd_recipient_restrictions =
reject_non_fqdn_recipient
reject_non_fqdn_sender
reject_unlisted_recipient
check_client_access
hash:/usr/pkg/etc/postfix/client_checks
check_reverse_client_hostname_access
pcre:/usr/pkg/etc/postfix/rev_client_hostname.pcre
...

and I find some reject log entries that indicate a reject cause of
check_reverse_client_hostname_access:

Mar 28 12:17:53 glacier postfix/smtpd[16606]: NOQUEUE: reject: RCPT from
unknown[125.91.73.78]: 554 5.7.1 <unknown[125.91.73.78]>: Unverified
Client host rejected: Access denied; from=<mrwc>
to=<a080d2e7e> proto=ESMTP helo=<UATIM-03E1D7EF4>

Yet, the envelope recipient indicates the yahoo.com.tw domain. Since
this domain is not listed in any of my address classes, nor do I have
any catch-alls or open relay, I would have expected the reject cause to
be the earlier listed:

reject_unlisted_recipient

as opposed to the later:

check_reverse_client_hostname_access

What am I misunderstanding?
MrC