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ACL v4.8 - How To Reject Uknown Users -Before- RBL Checks

Discussion in 'E-mail Discussion' started by RickG, Jun 25, 2008.

  1. RickG

    RickG Well-Known Member

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    ACL v4.8 - Reject Uknown Users Before RBL Checks ?

    Is there an easy modification to the ACL Template V4.8 (via the Advanced Editor) so that unknown users are rejected prior to RBL checks taking place?

    I've got a client scenario where a fair amount of bandwidth is being used on calls to Spamhaus etc. for mail that arrives for unknown users (all accounts are set to :fail:). The junkmail is rejected after the RBL check, but in looking at the logs, a significant portion of this is addressed to users that do not exist in the first place.

    Is it as simple as moving (or copying) require verify = recipient above [% ACL_RBL_BLOCK %]?

    Thanks -
     
    #1 RickG, Jun 25, 2008
    Last edited: Jun 26, 2008
  2. HostIt

    HostIt Well-Known Member

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    With the usual caveat emptor disclaimers etc, I do believe that's what you'd need to do (at your own risk) :D

    I would also ensure that [% ACL_PRE_RECP_VERIFY_BLOCK %] is kept above "require verify = recipient", to ensure that Dictionary Attacks are dealt with appropriately.
     
  3. RickG

    RickG Well-Known Member

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    Thanks for the suggestions. Moved some things around and the changes are working as designed.
     
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