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Thread: RBL - score rather than block?

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    blazeking is offline Advanced Member
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    Default RBL - score rather than block?

    Hello all - I want my RBL (bl.spamcop.net) to score SA rather than block at the MTA level. Would I do this by removing "reject_rbl_client bl.spamcop.net" from main.cf, and instead configure it within "20_dnsbl_tests.cf" in ~/conf/spamassassin?

  2. #2
    FritzBrause is offline Partner (VAR/HSP)
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    Postfix will reject every message from a sender IP listed at one ore more RBLs configured. Using this configuration Amavis / Spamassassin will be not involved at all.

    Using Spamassassin only you may want to tweak /opt/zimbra/conf/spamassassin/20_dnsbl_tests.cf to your needs.

    I recommend one of the following configurations:


    • Configure 3-5 RBLs with postfix (Admin GUI)
    • Delete 20_dnsbl_tests.cf


    or

    • Do not configure any RBLs with postfix (Admin GUI)
    • Tweak 20_dnsbl_tests.cf


    The latter may cause a lot more CPU usage and disk IOPS. So use wit care.
    Best regards

    Andreas Wolske

    managedhosting.de GmbH

    Zimbra Cloud Hosting, Consulting & Support
    VMware vCloud Powered Serviceprovider

  3. #3
    blazeking is offline Advanced Member
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    So the only way to avoid the reject at MTA is by configuring SA, which causes a lot of CPU/disk use? We reject ~6000/day by RBL... not sure how much strain that will put on the system if it has to pass through SA.

  4. #4
    FritzBrause is offline Partner (VAR/HSP)
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    6000 per day will be no problem with todays hardware. If we would be talking about 150000 or more E-Mails per day it may become noticeable.
    Best regards

    Andreas Wolske

    managedhosting.de GmbH

    Zimbra Cloud Hosting, Consulting & Support
    VMware vCloud Powered Serviceprovider

  5. #5
    blazeking is offline Advanced Member
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    Thanks! I'll try it out and see if my hardware can handle it.

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