Re: [Exim] Forged hostname

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Autor: Frank Elsner
Data:  
A: Ron McKeating
CC: Exim-Users (E-mail)
Assumpte: Re: [Exim] Forged hostname
On Wed, 07 Jul 2004 15:06:17 BST Ron McKeating wrote:
> Hi all, we are seeing lots of spam with H=(our ip address) eg
>
> H=(158.125.1.193) [210.114.196.215]


Here's my ACL to catch them

check_helo:

  deny hosts = !127.0.0.0/8
       message = Illegal argument in HELO/EHLO ($sender_helo_name)
       log_message = Strange IP addr given
       condition = ${if and {\
                       { isip {$sender_helo_name}}\
                       { !eq  {$sender_helo_name}{$sender_host_address}}\
                       { !eq  {$sender_helo_name}{[$sender_host_address]}}\
                            }\
                        {yes}{no}}


  deny hosts = !127.0.0.0/8
       message = Illegal HELO/EHLO (You really can't be $primary_hostname)
       log_message = Illegal HELO/EHLO (primary_hostname)
       condition = ${if eq {${lc:$sender_helo_name}}{${lc:$primary_hostname}}\
                           {yes}{no}}


accept


Your milage may vary :-)

Regards        _______________________________________________________________
Frank Elsner  /                         c/o  Technische Universitaet Berlin   |
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