DKIM (DomainKeys Identified Mail) is a method of email authentication that verifies the authenticity of the sender of an email. It works by using digital signatures to verify that the message was sent by the domain owner and that the message content has not been altered in transit.
DKIM is used primarily to combat spam and phishing attacks, as these often involve the forgery of email headers and sender information. By implementing DKIM, companies can ensure that only authorized senders are sending messages on their behalf and that their messages are less likely to be flagged as spam or malicious. DKIM is also used to help ensure email deliverability by authenticating the sending domain and reducing the likelihood that messages will be blocked or rejected by recipient mail servers.
