With Kademi you can setup DKIM for a website that authorised Kademi to send emails using your website domain name.
DomainKeys Identified Mail (DKIM) is an email validation system designed to detect email spoofing by providing a mechanism to allow receiving mail exchangers to check that incoming mail from a domain is authorized by that domain's administrators and that the email (including attachements) has not been modified during transport . A digital signature included with the message can be validated by the recipient using the signer's public key published in the DNS. Read more