The email validation system SPF and the authentication method DKIM are key factors for optimizing your deliverability. This you may already know. But you might not be aware that it also very important to personalize these elements.
Quick reminder: what are SPF & DKIM made for?
The SPF and DKIM are used to authenticate the sender. They are used by the ISPs or webmail providers (Yahoo, Gmail, etc.) to find out whether or not an email should be delivered to the inbox of a recipient.
By default, most of the Email Service Providers insert some SPF and DKIM in the emails they route for their clients. Thanks to this system, the ISPs and Webmails are able to say: “OK, this email is legit, it’s not a phishing attempt”.
Personalized SPF & DKIM for free
Mailjet also inserts SPF and DKIM by default. But compared to its competitors, there is a big difference. We actually offer a personalization feature to anyone using our service.
Any Mailjet account can benefit from this functionality, even if it’s on a Free Plan. We have a good reason to do this: it’s something important!
Without personalized SPF & DKIM, it gets tougher
Last july, we published a blog post about it: Gmail was deploying an update for its anti-phishing system. We wanted to draw your attention on the “via” mention that could appear for the people who were not using personalized SPF and DKIM. As an illustration, this is the result:
It’s simple: the webmail accepts the email because it can authenticate it. But at the same time, it chooses to inform the recipient that the SPF and DKIM do not match with the actual sender (= the sender address).
With Mailjet, you don’t have to pay any extra to get rid of this “via” mention. We provide you a personalized signature and norm of authentication. You just have to add them in your DNS record.
See the difference?
Globally speaking and to avoid to draw unnecessary scrutiny, personalization of the authentication system is very important. It is also very good for your deliverability.