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@soyfrien
Created January 2, 2019 19:01
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554 5.7.1 Service unavailable; Client host [IP] blocked using example.com
When seeing these types of messages, it may be helpful to remove the failed service using zmprov. See below.
----- The following addresses had permanent fatal errors -----
<email address>
(reason: 554 5.7.1 Service unavailable; Client host [IP] blocked using dnsbl.njabl.org)
----- Transcript of session follows -----
... while talking to MAIL.SERVER.HOSTNAME:
>>> DATA
<<< 554 5.7.1 Service unavailable; Client host [IP] blocked using dnsbl.njabl.org
554 5.0.0 Service unavailable
<<< 554 5.5.1 Error: no valid recipients
-----------------------------------
The response from the remote server was:
554 5.7.1 Service unavailable; Client host [IP] blocked using dnsbl.njabl.org
------------------------------------
----- Transcript of session follows -----
... while talking to recv.psych.columbia.edu.:
>>> DATA
<<< 554 5.7.1 Service unavailable; Client host [128.59.72.56] blocked using dnsbl.njabl.org
554 5.0.0 Service unavailable
<<< 554 5.5.1 Error: no valid recipients
-----------------------------------
root@mail:/home/systems# su - zimbra
zimbra@mail:~$ zmprov gacf | grep zimbraMtaRestriction
zimbraMtaRestriction: reject_invalid_hostname
zimbraMtaRestriction: reject_non_fqdn_hostname
zimbraMtaRestriction: reject_non_fqdn_sender
zimbraMtaRestriction: reject_unknown_client
zimbraMtaRestriction: reject_unknown_hostname
zimbraMtaRestriction: reject_unknown_sender_domain
zimbraMtaRestriction: check_policy_service unix:private/policy
zimbraMtaRestriction: reject_rbl_client cbl.abuseat.org
zimbraMtaRestriction: reject_rbl_client dnsbl.njabl.org
zimbraMtaRestriction: reject_rbl_client sbl.spamhaus.org
zimbraMtaRestriction: reject_rbl_client b.barracudacentral.org
zimbraMtaRestriction: reject_rbl_client zen.spamhaus.org
zimbraMtaRestriction: reject_rbl_client psb.surriel.com
zimbraMtaRestriction: reject_rbl_client bl.spamcop.net
zimbraMtaRestriction: reject_rhsbl_client dbl.spamhaus.org
zimbraMtaRestriction: reject_rhsbl_client multi.uribl.com
zimbraMtaRestriction: reject_rhsbl_client multi.surbl.org
zimbraMtaRestriction: reject_rhsbl_client rhsbl.sorbs.net
zimbraMtaRestriction: reject_rhsbl_reverse_client dbl.spamhaus.org
zimbraMtaRestriction: reject_rhsbl_sender multi.uribl.com
zimbraMtaRestriction: reject_rhsbl_sender multi.surbl.org
zimbraMtaRestriction: reject_rhsbl_sender rhsbl.sorbs.net
zimbraMtaRestriction: reject_rhsbl_sender dbl.spamhaus.org
# Remove the offender
zimbra@mail:~$ zmprov mcf -zimbraMtaRestriction "reject_rbl_client dnsbl.njabl.org"
# Check to see if it's really gone
zimbra@mail:~$ zmprov gacf | grep zimbraMtaRestriction
zimbraMtaRestriction: reject_invalid_hostname
zimbraMtaRestriction: reject_non_fqdn_hostname
zimbraMtaRestriction: reject_non_fqdn_sender
zimbraMtaRestriction: reject_unknown_client
zimbraMtaRestriction: reject_unknown_hostname
zimbraMtaRestriction: reject_unknown_sender_domain
zimbraMtaRestriction: check_policy_service unix:private/policy
zimbraMtaRestriction: reject_rbl_client cbl.abuseat.org
zimbraMtaRestriction: reject_rbl_client sbl.spamhaus.org
zimbraMtaRestriction: reject_rbl_client b.barracudacentral.org
zimbraMtaRestriction: reject_rbl_client zen.spamhaus.org
zimbraMtaRestriction: reject_rbl_client psb.surriel.com
zimbraMtaRestriction: reject_rbl_client bl.spamcop.net
zimbraMtaRestriction: reject_rhsbl_client dbl.spamhaus.org
zimbraMtaRestriction: reject_rhsbl_client multi.uribl.com
zimbraMtaRestriction: reject_rhsbl_client multi.surbl.org
zimbraMtaRestriction: reject_rhsbl_client rhsbl.sorbs.net
zimbraMtaRestriction: reject_rhsbl_reverse_client dbl.spamhaus.org
zimbraMtaRestriction: reject_rhsbl_sender multi.uribl.com
zimbraMtaRestriction: reject_rhsbl_sender multi.surbl.org
zimbraMtaRestriction: reject_rhsbl_sender rhsbl.sorbs.net
zimbraMtaRestriction: reject_rhsbl_sender dbl.spamhaus.org
# You may need to resrtart the services
zimbra@mail:~$ zmcontrol -v restart
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