Introduction:
DKIM (DomainKeys Identified Mail) is an email authentication method that allows the sender to sign their emails with a private key, which can be verified by recipients using a public key published in the DNS.
How DKIM Works:
- Signing Emails: The sender's mail server signs outgoing emails with a private key.
- DNS Public Key: The sender publishes a public key in their DNS records.
- Verification: The recipient's mail server uses the public key to verify the signature.
Setting Up a DKIM Record:
- Generate a DKIM Key Pair: Generate a private and public key pair using your email server or a DKIM key generation tool.
- Publish the Public Key in DNS: Add a DNS TXT record containing the public key. An example DKIM record might look like this: default._domainkey.example.com IN TXT "v=DKIM1; k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQ...".
- Configure Your Mail Server: Configure your mail server to sign outgoing emails with the private key.
- Test the Configuration: Use DKIM verification tools to ensure your setup is correct.
