On Tue, Dec 26, 2006 at 06:44:37PM -0800, Marc Perkel wrote:
> How would I do this in an ACL? I want to test to see if the IP of the
> interface that my server received the message on is the lowest MX record
> for the domain that it's being sent to.
I don't think its possible within Exim itself. Part of the way could be
to get the MX via a dnsdb lookup, such as:
${lookup dnsdb{defer_lax,mx=$domain}{$value}fail}
but that doesn't allow you to order the output. Instead, maybe you could
use a shell script such as:
#!/bin/sh
PATH="/bin:/usr/bin"
host -tmx $1 \
|grep 'handled by' \
|sort -nk6 \
| awk ' { print $7 } ' \
|head -1 \
|xargs host -ta \
|grep 'has address' \
|awk ' { print $4 } '
And then use a ${run} command to put this in your ACL:
condition = ${if eq {$interface_address} \
{${run{/usr/exim/bin/lowest_mx $domain}{$value}fail}} \
{yes}{no} }
Not tested, but may be something to get you started.
Colin.
--
"Developers are like artists; they produce their best work if they
have the freedom to do so" - Werner Vogels, CTO Amazon.com
