DomainKeys and DKIM can help you to increase the reputation of your e-mail server and preventing others to manipulate or...
DKIM stands for "DomainKeys Identified Mail" and it is an email authentication method used to verify the authenticity and integrity of email messages. DKIM helps combat email spoofing, phishing, and spam by allowing email recipients to check if an email message was actually sent by the claimed sender and if it has been altered in transit.