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Thread: spam attack!

  1. #1
    BrianA is offline Senior Member
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    Default spam attack!

    well I opened zimbra up to the internet, and just checked the mail.log after a couple of days.
    it was astonishing.

    mail:/var/log# cat mail.log | grep reject | wc -l
    196785

    yep, around 200k spam rejects in 1.5 days!!!

    so I've disabled port 25 for now. Does anyone have any comment why I'd be copping this attack? Is there a weakness in zimbra? there doesnt seem to be, theres no accepts going through. my other mail server fends of 1500 spam per day, nothing like what I'm seeing here. I just dont see why the spammers would be throwing this at me unless they found some flaw. Backscatter spam? who knows?

    Looks like I'll be putting my exim relay (spam/virus blocker) in the front line and zimbra behind it.

    regards

    Brian

  2. #2
    phoenix is online now Zimbra Consultant & Moderator
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    Quote Originally Posted by BrianA View Post
    yep, around 200k spam rejects in 1.5 days!!!
    Your answer is in the word 'reject', anyone who opens a mail server to the internet gets spam sent to them. I think the statistics show 95-97% of all the mail on the internet is spam, are you surprised that you get spam? If the mail is being rejected then there's nothing to worry about, Zimbra is doing it's job.
    Last edited by phoenix; 06-07-2008 at 08:56 AM.
    Regards


    Bill


    Acompli: A new adventure for Co-Founder KevinH.

  3. #3
    phoenix is online now Zimbra Consultant & Moderator
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    If you are having problems with spam then you could also try some of the tips in this wiki article, specifically the Simultaneous Connection Throttling.
    Regards


    Bill


    Acompli: A new adventure for Co-Founder KevinH.

  4. #4
    BrianA is offline Senior Member
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    Default not surprised at getting spam

    just concerned about the concerted effort being shown.

    throttling sounds like what I want. I have an exim rig that i use around the place that throttles and tarpits. I might use it here as well.

    cheers Brian.

    #$%#% spammers.

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