DomainKeys Identified Mail (DKIM) is an email validation system that detects email spoofing by validating a domain name identity associated with a message through cryptographic authentication.

IMSVA allows you to prevent spoofing by adding a digital signature to outgoing message headers using the DKIM standard. Recipients can verify that the email messages from your domain are authorized by the domain's administrator and that the messages, including attachments, have not been modified during transport.

On the IMSVA management console, you can add or delete DKIM signatures and import or export DKIM signature files.