How to install dkim for postfix in centos 5.4

I am trying to install DKIM for my postfix so that i have a signature. I am following this guide: http://allaboutlamp.com/2009/09/setup-dkim-for-postfix-in-fedora-using-dkim-milter/

But how do i create a DNS record for TXT ? Where is the file. My originaldomain.com is running in a hosted server, where i dont have terminal access. And i have another server where i am trying to install this setup. Which is only for outgoing emails for newsletters.

Step 1:
[root@out tmp]# openssl genrsa -out rsa.private 1024
[root@out tmp]# openssl rsa -in rsa.private -out rsa.public -pubout -outform PEM
[root@out tmp]# ls
rsa.private  rsa.public

Step 2: How can i know assign dkim postfix signatures?
[root@out tmp]# yum list dkim-milter
Loaded plugins: fastestmirror, replace
Loading mirror speeds from cached hostfile
 * addons: ftp.heanet.ie
 * base: ftp.heanet.ie
 * epel: ftp.heanet.ie
 * extras: ftp.heanet.ie
 * ius: mirror.rackspace.com
 * rpmforge: apt.sw.be
 * updates: ftp.heanet.ie
Installed Packages
dkim-milter.x86_64                                                                                     2.8.3-4.el5                                                                                      installed
[root@out tmp]# 

Answer

I have had good success using DKIMProxy. Check out this article: http://www.brandonchecketts.com/archives/getting-dkimproxy-installed-and-configured

And in your comments to @mattdm you are confusing SPF with DKIM-Signature. Both use DNS TXT records but they are separate things/records. With some Registrars/DNS Providers you need to turn on “Advanced DNS Records” or similar description in order to create TXT records.

You basically publish the public part of your key in the TXT record for DKIM-Signature.

HTH

Cheers

Attribution
Source : Link , Question Author : YumYumYum , Answer Author : HTTP500

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