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Thread: Improve antispam

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  1. #1
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    Default Improve antispam

    Edited my /opt/zimbra/conf/spamassassin/local.cf to look like this (according to article regarding improving antispam solution):

    As I understand, razor2 etc is installed now by default, so all I have done basicly is to install red hat enterprise linux 5, fetchmail, disbaled exim, installed gmp as required during the install and then edited the local.cf according to below paste, am I good to go or is there other things I should consider? Also is SPF enabled now by default?

    # This is the right place to customize your installation of SpamAssassin.
    #
    # See 'perldoc Mail::SpamAssassin::Conf' for details of what can be
    # tweaked.
    #
    # Only a small subset of options are listed below
    #
    ################################################## #########################

    # Add *****SPAM***** to the Subject header of spam e-mails
    #
    # rewrite_header Subject *****SPAM*****


    # Save spam messages as a message/rfc822 MIME attachment instead of
    # modifying the original message (0: off, 2: use text/plain instead)
    #
    # report_safe 1


    # Set which networks or hosts are considered 'trusted' by your mail
    # server (i.e. not spammers)
    #
    # trusted_networks 212.17.35.


    # Set file-locking method (flock is not safe over NFS, but is faster)
    #
    lock_method flock


    # Set the threshold at which a message is considered spam (default: 5.0)
    #
    # required_score 5.0


    # Use Bayesian classifier (default: 1)
    #
    # use_bayes 1


    # Bayesian classifier auto-learning (default: 1)
    #
    # bayes_auto_learn 1


    # Set headers which may provide inappropriate cues to the Bayesian
    # classifier
    #
    # bayes_ignore_header X-Bogosity
    # bayes_ignore_header X-Spam-Flag
    # bayes_ignore_header X-Spam-Status

    score SPF_FAIL 10.000
    score SPF_HELO_FAIL 10.000
    score RAZOR2_CHECK 2.500
    score PYZOR_CHECK 2.500
    score BAYES_99 4.300
    score BAYES_90 3.500
    score BAYES_80 3.000

    # Score to reduce the effect of Bonded Sender Program (BSP) whitelisting
    score RCVD_IN_BSP_TRUSTED -0.500
    score RCVD_IN_BSP_OTHER -0.500
    score RCVD_IN_BONDEDSENDER -0.500

    # Score to reduce the effect of Habeas whitelisting
    score HABEAS_ACCREDITED_COI 0 -0.5 0 -0.5
    score HABEAS_ACCREDITED_SOI 0 -0.25 0 -0.25
    score HABEAS_CHECKED 0 -0.1 0 -0.1

    # Score to reduce the effect of ISIPP/IADB SuretyMail whitelisting
    score RCVD_IN_IADB_VOUCHED 0 -0.2 0 -0.2
    score RCVD_IN_IADB_DOPTIN 0 -0.4 0 -0.4
    score RCVD_IN_IADB_ML_DOPTIN 0 -0.6 0 -0.6

  2. #2
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    Default

    Also, is there any logs that will tell me which e-mails have been totally blocked by the filters and never went to users "junk" folder? Can the junk folder somehow be mainted via an imap client, like thunderbird or outlook 2003/2007 or similar? And logs for why the score for spam was scored as they where, is that possible to setup? Also, is the mail actually from users Junk folder supposed to be copied to spam account? Cause I can see that spam / ham accounts have 0.0mb stored..
    Last edited by osiris; 02-08-2008 at 04:07 AM.

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