On Fri, Aug 22, 2014 at 5:50 PM, Systems Controllor <
www.query@gmail.com> wrote:
> Exim 4.63 (Centos 5) and Exim 4.72 (Centos 6).
I build current 64 bit versions of Exim for C5 and C6, available for
download if you want them at
http://downloads.mrball.net/Linux/CentOS/. They are built differently
than the distro provided versions.
> I would like to trap and then use the absence of a Host name in ACL
> Connection.
> Exim log shows: 13:35:34 no host name found for IP address 207.191.2.243
> The best I have managed to do is:-
> ----------------------------------
> warn message = ${run{SHELL -c "PHP EXIM_ALERT \
> 'cA:host' \
> 'host$sender_host_name' \
> 'ip$sender_host_address' \
> 'mx${primary_hostname}' \
> 'msg[SNA04] (Host name absent) or (No Reverse DNS)' \
> 'port$sender_host_port'"}}
> condition = ${if and{{def:sender_host_address} \
> {!def:sender_host_name}} {yes}{no}}
>
> deny message = [SNA04] Rejected. (Host name absent) or (No Reverse \
> DNS) ...........
> condition = ${if and{{def:sender_host_address} \
> {!def:sender_host_name}} {yes}{no}}
> ----------------------------------
>
> The above condition, found on the Internet, can not discriminate between
> the absence of a host name and the absence of a Reverse DNS entry.
I use this to check if a host has rDNS:
condition = ${lookup dnsdb{defer_never,ptr=$sender_host_address}{yes}}
To negate it, just add the NOT logical operator:
!condition = ${lookup dnsdb{defer_never,ptr=$sender_host_address}{yes}}
...Todd
--
The total budget at all receivers for solving senders' problems is $0.
If you want them to accept your mail and manage it the way you want,
send it the way the spec says to. --John Levine
