Receiving a lot of spam

Discussion in 'Installation/Configuration' started by garfabian, May 17, 2007.

  1. garfabian

    garfabian New Member

    I been getting a lot of spam I have spamassasin setup and scores the email fine but lately been getting a lot of spam is there any configuration that I can do to further trim the spam coming in? using postfix as MTA. Thank you.
     
  2. Hans

    Hans Moderator ISPConfig Developer

    You can use Razor, Pyzor, DCC for Spamassassin.

    As you are using Postfix as your MTA, you can consider to install Postgrey, a greylisting system for Postfix. I have good experience with that.
     
  3. garfabian

    garfabian New Member

    Thank you I will check these out, I did try getting postgrey up and running but didn't finish it is there any tutorial or how to you might suggest.
     
  4. Hans

    Hans Moderator ISPConfig Developer

  5. toyito

    toyito New Member

    Hi, can i use this guide on an Production ISP serfer???, if so....How?

    Regards

    Hector
     
  6. Hans

    Hans Moderator ISPConfig Developer

    Yes you can, i did it myself :)
     
  7. fireba11

    fireba11 Member HowtoForge Supporter

    also you might want to run sa-update once in a while
     
  8. Hans

    Hans Moderator ISPConfig Developer

    You can also update the Spamasassin rules automaticly with a cron job like this:

    23 4 */2 * * /usr/local/sbin/sa_rules_update.sh &> /dev/null
     
  9. mlz

    mlz New Member

    Wouldn't this work better?

    Code:
    23 4 */2 * * /home/admispconfig/ispconfig/tools/spamassassin/usr/bin/sa-update &> /dev/null
    Using the perfect setup, the distro SA wasn't installed, so I don't have sa_rules_update.sh on my system...
     
  10. AlArenal

    AlArenal New Member

    The best way ro prevent spam is
    1. prevent spam from getting into your mailbox,
    2. have SA work with a good ruleset.

    1.:
    This tutorial by falko should server as a good starting point: http://www.howtoforge.com/block_spam_at_mta_level_postfix
    Don't read its config as if it were set to stone. Take your time to find out which RBLs works best for you. In my case the SORBS lists tend to block too much ham (escpecially freemail servers as hotmail, tiscali, ...). Abuseat's RBL is not needed if you use Spamhaus (it's included) and their sbl-xbl RBL shouldn't be used anymore, use zen instead.
    Other tutorials may advise you to use reject_unknown_client. While technically the use of this rule is good you'll run into problems pretty soon, as many servers, even those of global players are often misconfigured and therefore would get blocked.

    2.:
    Use RulesDuJour in conjunction with SA to have a good base of rulesets and keep them updated. To use it with ISPConfig's SA, you better do some symlinking, so you do not have to change RDJ's code.
     
  11. timbe

    timbe New Member

    how would you symlink to include RulesDuJour with SA included with ISPConfig, also how can I add my own Spamassassin filters to run SA with RulesDuJour and make it all global to every client hosted?
     
  12. falko

    falko Super Moderator ISPConfig Developer

    The configuration files of ISPConfig's SpamAssassin are located in /home/admispconfig/ispconfig/tools/spamassassin/etc/mail/spamassassin, so you must store the rules there.
     

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