Automatic DKIM key rotation

SMTPeter can now automatically rotate your DKIM keys. If you let your emails flow through our servers, you no longer have to take care of changing your DNS records to rotate your keys. Just follow the suggestions on the SMTPeter dashboard, and you get automatically rotating DKIM keys.

What changed? Well, we've enhanced the "sender domain" tools on the dashboard. From now on, you just have to tell us from which domain you are going to send email (like ""), and follow up our DNS recommendations. Once you've followed this advise and set up your DNS records, you're all set and can send emails through, without ever having to worry about your DNS settings again.

How does this work under the hood?

We used to give you detailed instructions on how to set up your DNS records, and how you should change your records every couple of months to get new and safe DKIM keys. However, instead of giving these detailed instructions, we thought it would be much easier if we just created the right DNS records for you. After all, we have all the knowledge, so we can set up your DNS records so that they work best for you. Besides that, we also thought it would be easier if we would update your records every couple of weeks to rotate your DKIM keys or to make other necessary changes.

Of course, we do not have access to your domain, so it is technically not possible to create or modify your DNS records directly. However, we can create records under our own domain ("") and ask you to set up aliases (in DNS an alias is called a "CNAME" record) to our records. And that is exactly what we do now. We set up your DKIM, SPF and DMARC records under our own domain, and you just have to set up CNAME records in your DNS.

Do I still have to set up DKIM keys?

The SMTPeter dashboard allows you to configure "sender domains" as well as "dkim keys". However, under normal circumstances, you only need to set up sender domains. After setting up a sender domain, you receive a list of recommended DNS settings. If you copy these to your own DNS server, you are all set. You no longer need to explicitly configure dkim keys via the dashboard.

For backwards compatibility, and/or very advanced users the "dkim keys" button is still visible on the dashboard. But you no longer need it.