DKIMEinträge

DKIM stands for DomainKeys Identified Mail. DKIM entries are DNS records that help email providers verify that an email message was actually sent by the claimed sender and has not been tampered with. When an email is sent, the sender's mail server creates a digital signature for the message based on its content and a private key. This signature is then included in the email's headers. The receiving mail server retrieves the public key from the DKIM record published in the sender's domain's DNS. It then uses this public key to verify the signature. If the signature is valid, it confirms the email's authenticity and integrity.

DKIM entries are typically TXT records within a domain's DNS settings. The record includes a selector, which is a user-defined string that helps distinguish between multiple DKIM keys for the same domain, and the public key itself. A common format for a DKIM record might look something like: `selector._domainkey.yourdomain.com IN TXT "v=DKIM1; k=rsa; p=your_public_key_here"`. The `v` tag indicates the DKIM version, `k` specifies the key type (commonly RSA), and `p` contains the actual public key. Implementing DKIM is a crucial step in email authentication, helping to combat phishing and spam by increasing sender reputation and email deliverability.