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RBL vs Exim banned IPs (which one consumes less memory)

Discussion in 'E-mail Discussions' started by albatroz, Apr 24, 2014.

  1. albatroz

    albatroz Well-Known Member

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    I have made a script that imports the IPs banned by Exim (I use WHM for editing this list)
    into my custom blacklist, however I am worried that this list may become too big, so
    I have a doubt on how efficient is Exim´s memory use on this situation.

    I made this setup to avoid having to create a custom web app :)
    Is this a good idea or it would be better to keep the exim blacklist file size to the minimum?
     
  2. vanessa

    vanessa Well-Known Member
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    It may be considered more efficient, as far as memory is concerned. to set up the blacklist as a DNSBL, then have Exim query it like it would any other RBL. I used the below instructions the first time I ever did this, which was a long time ago so you'd need to adjust accordingly for CentOS 6:

    Running your own RBL DNS blacklist using rbldnsd

    Then to integrate with Exim:

    https://documentation.cpanel.net/display/ALD/RBLs#RBLs-AddacustomRBL


    This is probably only more efficient if your blacklist is massive - like thousands of entries. If not, continuing to use a flat file should be fine.
     
  3. cPanelMichael

    cPanelMichael Forums Analyst
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    Hello :)

    Yes, Vanessa's post above is good advice. It also depends on what you consider to be a large list. 100 IP addresses might seem like a lot to some users, but in reality that should not pose much of an issue as far as CPU/Memory usage.

    Thank you.
     
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