Apple mail dkim

DKIM (DomainKeys Identified Mail) is a security protocol used to authenticate the sender of an email message. It allows the sender's domain to sign the email message with a digital signature, which can be verified by the recipient's mail server.

Here's how DKIM works:

1. The sender's mail server generates a private key and a corresponding public key.
2. The private key is used to sign the email message with a digital signature.
3. The public key is published in the sender's DNS records (specifically, the TXT record).
4. The recipient's mail server retrieves the public key from the DNS record and uses it to verify the digital signature.
5. If the digital signature matches the hash of the email message, the recipient's mail server knows that the email came from the claimed sender and is not spoofed.

To set up DKIM in Apple Mail, you'll need to follow these steps:

Step 1: Generate a private key and public key

You can use a tool like OpenSSL to generate a private key and public key. Here's an example command:

openssl genrsa -out private_key.pem 1024
openssl rsa -pubout -in private_key.pem -out public_key.pem

Step 2: Create a TXT record

Create a TXT record in your DNS settings with the following format:

_kmt._domainkey.example.com. IN TXT "v=DKIM1; k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQC..."

Replace example.com with your domain name, and MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQC... with the public key.

Step 3: Configure Apple Mail

In Apple Mail, go to Preferences > Accounts > [Your Account] > Advanced. Click on the "Authentication" tab and select "DKIM" as the authentication method.

Enter the following information:

• Domain: Your domain name (e.g., example.com)
• Selector: _kmt (this is the selector used in the TXT record)
• Private key: The contents of the private key file (private_key.pem)

Step 4: Test your DKIM setup

Use a tool like DKIM Analyzer or Mail Tester to test your DKIM setup. Send an email from your Apple Mail account to a recipient's email address, and then check the email headers to see if the DKIM signature is present and valid.

That's it! With these steps, you should be able to set up DKIM in Apple Mail and start sending authenticated emails.