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+>>> #
+>>> # Initialize.
+>>> #
+>>> #msg_verbose 1
+>>> smtpd_delay_reject 0
+OK
+>>> mynetworks 127.0.0.0/8,168.100.3.0/28
+OK
+>>> mydestination porcupine.org
+OK
+>>> relay_domains porcupine.org
+OK
+>>> helo foobar
+OK
+>>>
+>>> #
+>>> # DNSWL (by IP address)
+>>> #
+>>>
+>>> # Allowlist overrides reject.
+>>> client_restrictions permit_dnswl_client,wild.porcupine.org,reject
+OK
+>>> client spike.porcupine.org 168.100.3.2
+OK
+>>>
+>>> # Allowlist does not fire - reject.
+>>> client_restrictions permit_dnswl_client,porcupine.org,reject
+OK
+>>> client spike.porcupine.org 168.100.3.2
+./smtpd_check: <queue id>: reject: CONNECT from spike.porcupine.org[168.100.3.2]: 554 5.7.1 <spike.porcupine.org[168.100.3.2]>: Client host rejected: Access denied; proto=SMTP helo=<foobar>
+554 5.7.1 <spike.porcupine.org[168.100.3.2]>: Client host rejected: Access denied
+>>>
+>>> # Allowlist does not override reject_unauth_destination.
+>>> client_restrictions permit
+OK
+>>> recipient_restrictions permit_dnswl_client,wild.porcupine.org,reject_unauth_destination
+OK
+>>> # Unauthorized destination - reject.
+>>> rcpt rname@rdomain
+./smtpd_check: <queue id>: reject: RCPT from spike.porcupine.org[168.100.3.2]: 554 5.7.1 <rname@rdomain>: Relay access denied; to=<rname@rdomain> proto=SMTP helo=<foobar>
+554 5.7.1 <rname@rdomain>: Relay access denied
+>>> # Authorized destination - accept.
+>>> rcpt wietse@porcupine.org
+OK
+>>>
+>>> #
+>>> # RHSWL (by domain name)
+>>> #
+>>>
+>>> # Allowlist overrides reject.
+>>> client_restrictions permit_rhswl_client,dnswl.porcupine.org,reject
+OK
+>>> # Non-allowlisted client name - reject.
+>>> client spike.porcupine.org 168.100.3.2
+./smtpd_check: <queue id>: reject: CONNECT from spike.porcupine.org[168.100.3.2]: 554 5.7.1 <spike.porcupine.org[168.100.3.2]>: Client host rejected: Access denied; proto=SMTP helo=<foobar>
+554 5.7.1 <spike.porcupine.org[168.100.3.2]>: Client host rejected: Access denied
+>>> # Allowlisted client name - accept.
+>>> client example.tld 168.100.3.2
+OK
+>>>
+>>> # Allowlist does not override reject_unauth_destination.
+>>> client_restrictions permit
+OK
+>>> recipient_restrictions permit_rhswl_client,dnswl.porcupine.org,reject_unauth_destination
+OK
+>>> # Non-allowlisted client name.
+>>> client spike.porcupine.org 168.100.3.2
+OK
+>>> # Unauthorized destination - reject.
+>>> rcpt rname@rdomain
+./smtpd_check: <queue id>: reject: RCPT from spike.porcupine.org[168.100.3.2]: 554 5.7.1 <rname@rdomain>: Relay access denied; to=<rname@rdomain> proto=SMTP helo=<foobar>
+554 5.7.1 <rname@rdomain>: Relay access denied
+>>> # Authorized destination - accept.
+>>> rcpt wietse@porcupine.org
+OK
+>>> # Allowlisted client name.
+>>> client example.tld 168.100.3.2
+OK
+>>> # Unauthorized destination - reject.
+>>> rcpt rname@rdomain
+./smtpd_check: <queue id>: reject: RCPT from example.tld[168.100.3.2]: 554 5.7.1 <rname@rdomain>: Relay access denied; to=<rname@rdomain> proto=SMTP helo=<foobar>
+554 5.7.1 <rname@rdomain>: Relay access denied
+>>> # Authorized destination - accept.
+>>> rcpt wietse@porcupine.org
+OK
+>>> # Numeric TLD - dunno.
+>>> rcpt wietse@12345
+./smtpd_check: <queue id>: reject: RCPT from example.tld[168.100.3.2]: 554 5.7.1 <wietse@12345>: Relay access denied; to=<wietse@12345> proto=SMTP helo=<foobar>
+554 5.7.1 <wietse@12345>: Relay access denied
+>>> rcpt wietse@12345.porcupine.org
+OK
+>>> rcpt wietse@porcupine.12345
+./smtpd_check: <queue id>: reject: RCPT from example.tld[168.100.3.2]: 554 5.7.1 <wietse@porcupine.12345>: Relay access denied; to=<wietse@porcupine.12345> proto=SMTP helo=<foobar>
+554 5.7.1 <wietse@porcupine.12345>: Relay access denied