I'm running email sending campaigns with milions of emails, and I need to sign each and one of them with DKIM. Unfortunately that's the bottleneck of the process.
I wonder if I can calculate a DKIM signature ONCE and use it in all of the mails (maybe only signing the subject, that is common to the whole campaign).
Is that possible?
I am trying to setup an DKIM email signing for a postfix SMTP server.
This server is to be used by different services on the local network.
I have generated DKIM key pair, added it to my domain and was able to successfully send emails out from the server itself as seen here:
me@server:~$ telnet localhost 25
Trying 127.0.0.1...
Connected to localhost.
Escape character is '^]'.
220 server.lan ESM
I am using CentOs5 and postfix as an MTA for my server.
My situation is as follows:-
I have a mail server through which Php applications connect and send mails to the destination addresses.
The problem is that the the application servers donot have spf/dkim record set up and my server which actually relays the mails to the network has spf/dkim records.
So i want the mail sent by an application ha
It took me a long time to figure out all the steps involved, so here is what you need to do.
1) Turn on DKIM signing in your outgoing messages by going to WHM, Acount Functions, Modify an Account. Edit your account by clicking "Enable DKIM on this account". Alternatively, turn on DKIM on CPanel - Email Authentication for your web site.
Im using several subdomains and each one has an account. I need to be able to send mail from those accounts that have correct dkim. Ive enabled spf and dkim in whm. I've used this command to generate the key "openssl genrsa -out /etc/dkim.key 1024 && openssl rsa -in /etc/dkim.key -out /etc/dkim.pub -pubout"
Do I need to copy public key in every account's DNS zone individually?
as in the title I am struggling with the creation of the dkim key.
For key creation I use these commands
openssl genrsa -out s1024.private 1024
openssl rsa -in s1024.private -out s1024.public -pubout -outform PEM
In this way I got the public and private keys.
After that I put the private key in /etc/dkim/ dir
and I make the test about the key in this way
dkim-testkey -d hostname -s s1024 -
Set Up DKIM For Multiple Domains On Postfix With dkim-milter 2.8.x (CentOS 5.3)
This tutorial shows how you can sign your email messages by using DKIM (DomainKeys Identified Mail) for multiple domains. Signing email allows the recipient of a message to confirm a message originated with the sender's domain and that the message content has not been altered.
I'm running Ubuntu 12.04 with Postfix and Mailman. I want to set up DKIM. (I believe DKIM is the same as what people call "DomainKeys").
What are the steps for setting this up?
Is opendkim recommended?
The only reference I have is HowToForge, but I prefer to get help here (even if it is just a confirmation of the steps at that link).
My domain is domain.tld, where I have DKIM functioning just fine. All of my domain emails are signed, and pass. I have a need now to send mail on behalf of my customers occasionally - ie: send email from john.doe@customers.tld, to sally@customers-customer.tld. I know that I can sign the Email with my domain.tld DKIM key, and it will "pass".
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