[exim] Outgoing Interface

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Autor: Grant Peel
Data:  
Dla: exim-users
Temat: [exim] Outgoing Interface
Hi all,

I would like to set the outgoing interface to the IP address assigned to the user's domian.

The problem I am encountering is that not all domains have thier MX set to an IP on our server (because some domains are using a mail filtering server that relays the message to our server after filtering).

Is there a way to rewrite the transport's 'interface' lines below, so it will attempt to use the MX, then the A record, then a default IP (the servers main IP) in that order?

remote_smtp_owm:
        driver = smtp
        helo_data       = $sender_address_domain
#       interface       = ${lookup dnsdb{a=${lookup dnsdb{mxh=$sender_address_domain}}}}
        return_path_add = true


remote_smtp_local:
        driver          = smtp
#       interface       = ${lookup dnsdb{a=${lookup dnsdb{mxh=$sender_address_domain}}}}
        helo_data       = $sender_address_domain
        return_path_add = true


remote_smtp_alias:
        driver          = smtp
        helo_data       = $parent_domain
#       interface       = ${lookup dnsdb{a=${lookup dnsdb{mxh=$parent_domain}}}}
        return_path_add = true


remote_smtp_bounce:
        driver = smtp
        helo_data = ${lookup dnsdb{defer_never,ptr=$interface_address}{$value}{$primary_hostname}}
#       interface = $interface_address
        return_path_add = true


-GrantFrom D.H.Davis@??? Tue Oct 06 14:59:59 2009
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Subject: Re: [exim] Exim development
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On Mon, 5 Oct 2009, W B Hacker wrote:

> From: W B Hacker <wbh@???>
> To: exim users <exim-users@???>
> Cc: Ian Eiloart <iane@???>
> Date: Mon, 5 Oct 2009 13:59:32
> Subject: Re: [exim] Exim development


...

> There is still a domainkeys lib in ports for that also - same
> maintainer, sky@???
>
> I haven't checked NetBSD, OpenBSD, DragonFlyBSD, but 'pkgsrc' may
> well have the DKIM option also.


There's no port of libdkim in the ports system for OpenBSD4.5.
A recent ports snapshot doesn't include it, so it looks like it
won't be in OpenBSD4.6. Obviously there'll be no libdkim-flavoured
version of exim in OpenBSD4.5/6.

The above's not a problem. libdkim-1.0.17 won't compile out of the
box on OpenBSD4.5. It fails with the error:

dkimverify.cpp: In member function `int SelectorInfo::Parse(char*)':
dkimverify.cpp:1199: error: invalid conversion from `const unsigned char**' to
`unsigned char**'
gmake: *** [dkimverify.o] Error 1

(The above is with gcc (GCC) 3.3.5 (propolice), later versions of
gcc may be more lenient.)

The fix is simple:

--- dkimverify.cpp.orig    Wed Apr  2 12:42:08 2008
+++ dkimverify.cpp    Tue Oct  6 09:49:47 2009
@@ -1196,7 +1196,7 @@
   else
   {
     unsigned char *PublicKeyData (unsigned char *)values[4];
-    EVP_PKEY *pkey 2i_PUBKEY(NULL, ((const unsigned char **)(&PublicKeyData)), PublicKeyLen);
+    EVP_PKEY *pkey 2i_PUBKEY(NULL, ((unsigned char **)(&PublicKeyData)), PublicKeyLen);


     if (pkey ðNULL)
       return DKIM_SELECTOR_PUBLIC_KEY_INVALID;


so it should be straightforward to build a libdkim-flavoured version
of exim from source.
--
Dennis Davis, BUCS, University of Bath, Bath, BA2 7AY, UK
D.H.Davis@???               Phone: +44 1225 386101