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Thread: Issues with RBL

  1. #1
    wenfrazier is offline Starter Member
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    Default Issues with RBL

    I am having an issue with my servers RBL configuration and need some guidance to get this sorted out. Basically I have clients that are being blocked by sorbs and spamcop, but are very important to my company's business. So far I have tried the below steps but still am having clients get blocked:


    [zimbra@mail ~]$ zmprov gacf | grep zimbraMtaRestriction
    zimbraMtaRestriction: reject_non_fqdn_sender
    zimbraMtaRestriction: reject_unknown_sender_domain
    zimbraMtaRestriction: reject_rbl_client dnsbl.njabl.org
    zimbraMtaRestriction: reject_rbl_client cbl.abuseat.org
    zimbraMtaRestriction: reject_rbl_client bl.spamcop.net
    zimbraMtaRestriction: reject_rbl_client dnsbl.sorbs.net
    zimbraMtaRestriction: reject_rbl_client sbl.spamhaus.org
    zimbraMtaRestriction: reject_rbl_client relays.mail-abuse.org


    Here is the command I ran to remove sorbs and spamcop:

    [zimbra@mail ~]$ zmprov mcf \
    > zimbraMtaRestriction reject_non_fqdn_sender \
    > zimbraMtaRestriction reject_unknown_sender_domain \
    > zimbraMtaRestriction "reject_rbl_client dnsbl.njabl.org" \
    > zimbraMtaRestriction "reject_rbl_client cbl.abuseat.org" \
    > zimbraMtaRestriction "reject_rbl_client sbl.spamhaus.org" \
    > zimbraMtaRestriction "reject_rbl_client relays.mail-abuse.org"



    Finally here is the output that shows we are no longer using them:

    [zimbra@mail ~]$ zmprov gacf | grep zimbraMtaRestriction zimbraMtaRestriction: reject_non_fqdn_sender
    zimbraMtaRestriction: reject_unknown_sender_domain
    zimbraMtaRestriction: reject_rbl_client dnsbl.njabl.org
    zimbraMtaRestriction: reject_rbl_client cbl.abuseat.org
    zimbraMtaRestriction: reject_rbl_client sbl.spamhaus.org
    zimbraMtaRestriction: reject_rbl_client relays.mail-abuse.org


    Also Zimbra has been restarted since the change to no avail. Is there something more that I can do to get this situation remedied so clients' emails are no longer getting blocked?

  2. #2
    devicegrip's Avatar
    devicegrip is offline Active Member
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    Default

    Just add the sender's domain to your global whitelist. This should bypass any spam filters. If the domain is not specific enough, spicify the user@domain and list all of the affected users.

    This is a normal part of using the RBLs. It's a good idea to compile a list of addresses or domains that you want to always get through anyway.

  3. #3
    soba@ukw.edu.pl is offline Special Member
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    Default

    Quote Originally Posted by devicegrip View Post
    Just add the sender's domain to your global whitelist. This should bypass any spam filters. If the domain is not specific enough, spicify the user@domain and list all of the affected users.

    This is a normal part of using the RBLs. It's a good idea to compile a list of addresses or domains that you want to always get through anyway.
    You can try to add in your main.cf (postfix) this line:

    check_rbl = reject_rbl_client sbl.spamhaus.org, reject_rbl_client sbl.spamhaus.org=127.0.0.2, reject_rbl_client xbl.spamhaus.org,
    reject_rbl_client xbl.spamhaus.org=127.0.0.4, reject_rbl_client xbl.spamhaus.org=127.0.0.5, reject_rbl_client xbl.spamhaus.org=127.0.0.6, reject_rbl_client pbl.spamhaus.org, reject_rbl_client
    pbl.spamhaus.org=127.0.0.10, reject_rbl_client pbl.spamhaus.org=127.0.0.11, reject_rbl_client zen.spamhaus.org, reject_rbl_client zen.spamhaus.org=127.0.0.2, reject_rbl_client zen.spamhaus.org=127.0.0.4,
    reject_rbl_client zen.spamhaus.org=127.0.0.5, reject_rbl_client zen.spamhaus.org=127.0.0.6, reject_rbl_client zen.spamhaus.org=127.0.0.7, reject_rbl_client zen.spamhaus.org=127.0.0.8,
    reject_rbl_client zen.spamhaus.org=127.0.0.10, reject_rbl_client zen.spamhaus.org=127.0.0.11, reject_rbl_client dnsbl.sorbs.net, reject_rbl_client dnsbl.sorbs.net=127.0.0.2
    # ZCS 7.1.3 SLES11 SP1

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