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SOLVED Exim Deny All Except

Discussion in 'E-mail Discussion' started by vponteras, Mar 8, 2018.

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  1. vponteras

    vponteras Member

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    Hi All,

    I want outgoing messages for our domain (our-domain.com) blocked except for other other domains. I tried the suggested exim filter from cPanelMichael but it's not working.

    I want our-domain to blocked from all domains but still can send to our-domain.com, allowed1.com and allowed2.com

    Here is my exim filter

    Code:
    if
      $header_from: contains "@our-domain" and
      $header_to: does not contain "@out-domain" or
      $header_to: does not contain "@allowed1.com" or
      $header_to: does not contain "@allowed2.com"
    then
      fail text "Unauthorized Mail"
    endif
    
    Please help
     
  2. cPanelMichael

    cPanelMichael Forums Analyst
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    Hello,

    Could you also outline the specific steps you have taken thus far to implement that custom filter rule?

    Note the email filter options in cPanel are designed to filter incoming email. You can customize the Exim system filter if you want to apply a filter to outgoing email. Information about modifying the Exim system filter is documented at:

    How to Customize the Exim System Filter File - cPanel Knowledge Base - cPanel Documentation

    Thank you.
     
  3. vponteras

    vponteras Member

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    Hi cPanelMichael,

    I am using the system filter /etc/cpanel_exim_system_filter_custom.

    I want block all incoming and outgoing mails except for our domain, allowed1.com and allowed2.com.

    Because we're planning to have our mails for company mails only and prevent incoming mails except for allowed1.com and allowed2.com

    What should be the suitable filter for that setup?
     
  4. cPanelMichael

    cPanelMichael Forums Analyst
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    Hello,

    The rules in your initial post look okay. In "WHM >> Exim Configuration Manager", under the "Filters" tab, are you using a custom filter for the "System Filter File" option? If so, you'd need to add your custom filter rules to that custom system filter file itself instead of adding them as separate filter files under the options directory. There's a thread on this topic at:

    Exim custom filter not working

    Thank you.
     
  5. vponteras

    vponteras Member

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    I am already using our custom filter
     

    Attached Files:

    #5 vponteras, Mar 8, 2018
    Last edited: Mar 9, 2018
  6. vponteras

    vponteras Member

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    Hi, anybody can help?
     
  7. rpvw

    rpvw Well-Known Member

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    In a normal account filter rule, the 'or' operator does not work using <does not contain>. I don't know about the custom rules for exim outgoing mail, but you could have a look at SOLVED - Account level filter "or" failing to see if it might be of any help.
     
  8. vponteras

    vponteras Member

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    Hi,

    This seems to work for me

    Code:
    if (
      $h_to: does not contain "our-domain.com" and
      $h_to: does not contain "allowed-domain1.com" and
      $h_to: does not contain "allowed-domain2.com" and
      $h_to: does not contain "allowed-domain3.com" and
      $h_to: does not contain "allowed-domain4.com"
      )
      and
      ($h_from: contains "our-domain.com")
    then
      fail text "Unauthorized Mail"
    endif
    
     
  9. cPanelMichael

    cPanelMichael Forums Analyst
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    Hello,

    I'm glad to see you found a suitable filter rule. Thank you for sharing the outcome.
     
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