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Exim bounces back entire spam messages

Discussion in 'E-mail Discussions' started by Bdzzld, May 29, 2009.

  1. Bdzzld

    Bdzzld Well-Known Member

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    Hi,

    We've noticed that some spam sources use (existing and non-existing) e-mail addresses which are being hosted on our servers in their "From" field. When the spam source then sends to an e-mail address which is no longer valid the receiving e-mail server creates a bounce of the message to the e-mail address in the "From" field. Then that message is bounced back by Exim again for sending to a non-exiting address on our servers. The problem with this is that Exim bounces the entire message, including the virus or spam message, and this unfortunately has resulted some time in getting the server onto a blacklist. I know Exim can be adjusted so it won't bounce back the enitre message, but only the header or subject of such a message.

    My problem/question is: How can Exim be configured as described without cPanel overwriting it after a new update??

    Thanks.
     
  2. cPanelDavidG

    cPanelDavidG Technical Product Specialist

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    Mind if our technical analysts work with you on this? The behavior you mention doesn't seem typical of Exim in a cPanel/WHM environment. You can contact our technical analysts at: http://tickets.cPanel.net/submit
     
    #2 cPanelDavidG, May 29, 2009
    Last edited: Jun 1, 2009
  3. Bdzzld

    Bdzzld Well-Known Member

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    Hi cPanelDavidG,

    Actually this is normal behaviour for Exim and can be configured with one or both of these variables :

    The problem is, that I could not find them in the default exim.conf file in cPanel and I have no idea where to put them.

    Thanks.
     
  4. excessnet

    excessnet Well-Known Member

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    Did you manage to disable bounce completly ?

    I'm using my cPanel server a secondary MX, when my Barracuda told him there's "No such user here", the cPanel exim create a bounce filling the queue. Since it's only a secondary MX, I don't care about bounce.

    How can I turn it off ?
     
  5. Bdzzld

    Bdzzld Well-Known Member

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    As cPanelDavidG could not point me into the direction, I've not invested any more time into it. If you (or any one else) are able to find a solution for this, please share it though.
     
  6. excessnet

    excessnet Well-Known Member

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    Finally, I used this solution : /http://www.farhad.ca/2006/07/27/how-to-disable-delayed-bounce-back-messages-in-exim/

    work very well! :)
     
  7. GaryT

    GaryT Well-Known Member

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    Taken from a thread in the forum, You can make it bounce back to the domain that sent it rather than the root which works great and no problems :) Hope it helps

     
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