DKIM on Ver 7.2.1?
I have Zimbra 7.2.1 running on Ubuntu 8.04 LTS, and I would like to implement DKIM, because I'm under the impression that it would improve the deliverability of my email. Version 8.0 has this readily available, from what I understand. But, is it possible to implement DKIM on 7.2.1, even, if need be, using some third party software?
I would be willing to upgrade to Version 8, but that appears to mean that I would have to go to 64-bit, and that would mean buying new hardware, if I understand it correctly, which I can't afford to do at the moment.
Search the forums (or the internet) for "openDKIM", follow any of the instructions you find.
I installed openDKIM. The problem is, in testing it, when I send email, in the header, on the receiving end I get the phrase, "domainkeys=neutral (no sig)".
I installed the program from source after downloading it from sourceforge.net - it's
version 2.7.2. I was using the tutorial
(which is not for Zimbra, but it is for Ubuntu, which I'm using), up to the point that
I was instructed to modify /etc/postfix/main.cf, and I discovered that
there was no postfix directory under /etc/ ! So, I switched over to this tutorial:
which is not for Ubuntu, but it is for Zimbra. I had already generated the public and
private keys before I started the second tutorial, using selector MAILOUT.
See below for the contents of /etc/opendkim.conf:
InternalHosts 192.168.1.0/24, 127.0.0.1
Still working on the DKIM problem. I tried running opendkim with the Argument -W to get more diagnostic info.
See below for the relevant content of /var/log/mail.log:
Nov 23 21:20:41 mail opendkim: OpenDKIM Filter v2.7.2 starting (args: -W -x /etc/opendkim.conf)
Nov 23 21:20:41 mail opendkim: OpenDKIM Filter: Unable to bind to port inet:8891@localhost: Address already in use
Nov 23 21:20:41 mail opendkim: OpenDKIM Filter: Unable to create listening socket on conn inet:8891@localhost
Nov 23 21:20:41 mail opendkim: OpenDKIM Filter v2.7.2 terminating with status -1, errno = 98
So, what might be causing this?
Can you check whether any service is already running on port 8891 as from the logs i can see that some service must be running on port 8891 which openDKIM is trying to run.Can you post the output of netstat -ntplu | grep 8891