DKIM is a verification standard which guarantees that if an email is being professed to be sent from a specific domain then it, in fact, is sent from that domain only. This authorization is accomplished with the help of public key cryptography. A private key, i.e., a digital signature is attached with every email’s domain, now the receiving mail server (ISP) performs the validation through the DNS (public key). This proves that whether the sent message hasn’t tampered in its transit state. A message later is considered authentic once the receiving server verifies the public key with the hash of private of the private key, this, in turn, lets the message pass the DKIM.
Apart from preventing email frauds, DKIM is also of great advantage in increasing your domain’s reputation. ISPs improve reputation and trust level if they find it convincing that your domain has higher engagement and low bounce rates and spams.
The primary advantage of DKIM is that it allows domain-based rundown of blacklist and whitelists to be more effective by permitting the signing domain to reliably recognize the stream of genuine emails.
The standard provides some motivation to mail senders for signing outgoing emails:
- DKIM enabled domains to get great help in identification of forged emails claiming to be generated from that domain, this allows a steep reduction in the abuse desk work.
- The owners of DKIM enabled domain can focus their abuse team energies in identifying and dealing with those who in reality is making in the appropriate use of their domain.
Why implement DKIM?
Impersonation of a trusted sender performed over SMTP is comparatively easier. For the end user, this leads to a high amount of spam in their mailbox, and all these claims to have been sent from a legitimate source. Now using trusted domains for executing malicious spams and phishing campaigns is one of the most popular technique. But what DKIM does is, it makes it harder for hackers to use the domains with DKIM protection enabled for their illegal actions.
DKIM being an optional security tool is not a universally adopted standard.
Being compatible with SPF, DMARC and other existing email infrastructure, DKIM provides layered protection for domains sending emails. Mailed servers still receive signed messages without any problem, even if they don’t support DKIM signatures.
Even though the standard is not of much use, but it is always advisable to have an added security layer for authenticating emails sent from your domain. Over time, your domain’s reputation is built through ISPs, this is the additional benefit of using DKIM standard. With time, when the parameters of your email delivery practices improve, like low spam and bounce rates, and higher engagement rates; you automatically contribute in building a good sending reputation with ISPs which thereby improves your mail delivery.
Since we’ve portrayed what DKIM does, how about we proceed onward to how it protects your domain’s email.
How does DKIM work?
DKIM utilizes two activities to check your messages. The principal move takes place on a server sending DKIM marked emails, while the second occurs on a recipient server checking DKIM marks on incoming messages. The whole procedure is made conceivable by a private/public key pair. Your private key is secret and secured, either on your own server or with your ESP and the public key is added to the DNS records for your domain to broadcast it to the world to help authenticate your messages.
How can KDMARC help?
KDMARC is Kratikal’s one-stop platform for helping organizations in securing their email domains. The analyzing tool protects your domain from email tempering providing unprecedented visibility into every legitimate and fraudulent email. KDMARC uses the same modern plumbing that mega companies use for their email delivery, as well as, helps your email domain to identify across the huge and growing footprint of DMARC – capable receivers.