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Increase the protection of your emails, 2048-bit DKIM keys

· 3 min read

When people talk about inbox placement rates and reputation, they inevitably think of SPF, DKIM and DMARC. Threats such as domain spoofing, phishing and spear phishing have been encouraging the development of more reassuring sender domain authentication strategies for brands for quite some time now.

And we have some interesting DKIM news to tell you about today.

What is a DKIM​

Let’s quickly go over some definitions so we’re sure we all know what we’re talking about and appreciate the value all the way through. DomainKeys Identified Mail is a cryptographic signature that guarantees the integrity of your message from the moment it is sent until it is received by the mailbox provider. Simply put, your messages contain some verifiable information that can confirm that you are responsible for the emails you send.

How does this work? Upon receiving the email and before delivering the message, the server verifies that the key in the header is the key associated with your sender domain. If it is, the content of the email is considered safe, i.e. it is confirmed that there has been no modification by a third party on the way and so the email ends up in the inbox.

Therefore, the more you pay attention to the key protection or make it difficult to break the key, the more you will be sure that all sending and receiving procedures will be done correctly. It is necessary to protect the key from increasingly frequent attacks by hackers.

From 562 bits to 2048 bits​

The longer a key is, the more difficult it will be to attack it. Over the years, we have gone from 562-character keys to 1024-character keys with a significant significant reductions in vulnerability and violability.

Today Contactlab is able to offer DKIM at 2048 bits. The optimal choice for brands is to customize DKIM by setting it on their domain and delegating it to Contactlab. Allowing you to sign emails with your domain name, ensures the integrity of the signed message content and further strengthens your reputation and the deliverability of the communications you send.

DKIM signing becomes even more of a key requirement to legitimize the sender domain. Increasing the length of the key is part of all the efforts you need to put in place to overcome spam filters, prevent your email campaigns from failing, and reach the inbox of your contacts, whether they are customers or prospects, without outside interference. Danger is always just around the corner.

Summarizing, why to use DKIM in your email campaigns​

  • To confirm that the authenticated domain actually sent the email.
  • To ensure that the content of the message was not changed during delivery.
  • To maintain high delivery rates.

Contact us to find out how to set up 2048-bit keys for your account. Contactlab is among the first ESPs to offer such high security services, don’t miss out. Continue to ensure maximum deliverability to your deliveries with this and other measures that our experts will advise you on.