DKIM stands for DomainKeys Identified Mail and is a method of email authentication that allows email receivers to verify that the messages they receive are authentic and have not been modified during transmission.
Here’s how it works:
1. The sender’s email server signs the email with a unique digital signature based on the sender’s domain name.
1. The recipient’s email server receives the email and retrieves the public key for the sender’s domain from the DNS server.
1. The recipient’s email server verifies the signature of the email using the public key and ensures that the message has not been tampered with.
1. If the signature is valid, the email is considered authentic and is passed along to the recipient’s inbox. If the signature is invalid, the email may be marked as spam or rejected entirely.
Overall, DKIM adds an additional layer of security to email communication by ensuring that the messages being sent are legitimate and have not been altered in any way.
