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Thread: Spam Control

  1. #1
    amitbiswas is offline Active Member
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    Default Spam Control

    Hi, I am using Release 5.0.2_GA_1975.UBUNTU6 UBUNTU6 FOSS edition and finding some problem with spam control. At this stage zimbra running on default setup, I have not done any customization and forwarding all spam to spam training account for last 2 months but unfortunately I am getting more spam mail then what I use to on my old postfix, amavis, spamassassin and greylist combination. I am looking for some suggestion how to minimize the spam into users inbox. Any help on this will be much appreciated. Thanks in advance.

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    mmorse's Avatar
    mmorse is offline Moderator
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    mshanley's Avatar
    mshanley is offline Loyal Member
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    Default Additional DNS RBL's - What I use

    Hi there...

    I have been running windows mail servers for a few years. This is my first Linux mail server.. currently running 6.0 GA on Ubuntu 804lts. 32bit.

    I have found these DNSBL Lists to work VERY well..
    zen.spamhaus.org
    bl.spamcop.net
    dnsbl-1.uceprotect.net
    ix.dnsbl.manitu.net
    dyna.spamrats.com
    noptr.spamrats.com
    all.rbl.jp
    safe.dnsbl.sorbs.net
    b.barracudacentral.org
    psbl.surriel.com
    dnsbl.ahbl.org
    dnsbl.njabl.org
    bhnc.njabl.org
    dnsbl.dronebl.org
    ubl.unsubscore.com


    Please feel free to check statistics with low false postivies from these sites.

    DNS Black list compared - look up dnsbl performance info
    Blacklists Compared, 22-Aug-09
    and
    DNSBL Resource: Statistics Center


    I did not include spamhaus below as i have it running at the firewall..on another box

    FYI..
    Do not use DSBL = offline
    Use only Zen for Spamhaus
    CBL is included in Zen, so no need to use it by itself.


    I added these rules by doing this...

    zmprov mcf +zimbraMtaRestriction "reject_rbl_client dnsbl-1.uceprotect.net"
    zmprov mcf +zimbraMtaRestriction "reject_rbl_client ix.dnsbl.manitu.net"
    zmprov mcf +zimbraMtaRestriction "reject_rbl_client dyna.spamrats.com"
    zmprov mcf +zimbraMtaRestriction "reject_rbl_client noptr.spamrats.com"
    zmprov mcf +zimbraMtaRestriction "reject_rbl_client all.rbl.jp"
    zmprov mcf +zimbraMtaRestriction "reject_rbl_client safe.dnsbl.sorbs.net"
    zmprov mcf +zimbraMtaRestriction "reject_rbl_client b.barracudacentral.org"
    zmprov mcf +zimbraMtaRestriction "reject_rbl_client psb.surriel.com"
    zmprov mcf +zimbraMtaRestriction "reject_rbl_client dnsbl.ahbl.org"
    zmprov mcf +zimbraMtaRestriction "reject_rbl_client dnsbl.njabl.org"
    zmprov mcf +zimbraMtaRestriction "reject_rbl_client bhnc.njabl.org"
    zmprov mcf +zimbraMtaRestriction "reject_rbl_client dnsbl.dronebl.org"
    zmprov mcf +zimbraMtaRestriction "reject_rbl_client ubl.unsubscore.com"


    verify rules added
    zmprov gacf | grep zimbraMtaRestriction

    then use
    zmmtactl restart

    Cheers!

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