DKIM (Domain Keys Identified Mail)

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DKIM adds a digital signature to outgoing emails, which email recipients can verify using the public key published in the domain's DNS records.

This helps ensure that the email content has not been tampered with during transit.

Here's how to set up DKIM:

1. Generate a DKIM key pair:

a. Access the control panel or interface communication directors email lists of your email server or hosting provider. Many hosting providers offer the option to generate DKIM key pairs directly from their control panel.

b. If your email service does not offer this feature, you can use a DKIM key generation tool or an online generator to create a DKIM key pair. A popular tool is OpenSSL:

openssl genpkey -algorithm RSA -out private.pem -aes256 -outform PEM
openssl rsa -in private.pem -pubout -out public.pem
These commands will generate a private key (private.pem) and a corresponding public key (public.pem).

2. Configure your email server:

a. Access your email server settings or control panel and look for the DKIM settings section.

b. Upload or copy the private key (private.pem) to your email server's DKIM settings. The way to do this may vary depending on your email server software.

c. Ensure that the private key is kept secure and not exposed to unauthorized persons.

3. Add a DKIM DNS record:

a. Once you have configured your email server with the private key, you need to create a DKIM DNS record. This DNS record will allow receiving email servers to verify the authenticity of your emails.