This article covers the SPF and DKIM authentication processes for Omnisend and how they are managed in Valimail. While only one of the two authentication methods is required for an email to pass DMARC, our recommendation is to configure both whenever possible.

Omnisend leverages Mailgun's email instrastructure.

Custom domain setup process

1. You will find Sender's domain settings in Store settings -> Sender's domains:

2. In order to sign your own domain, click + Add domain button:

3. Provide the exact domain (or sub-domain) you want to use for your Campaigns and/or Automation.

Note: You will need to add Omnisend's provided records to your DNS, so we recommend using a domain name that is the same as your store web, for example, @storename.com. Consequently, the right choice for the subdomain contains your store name: @info.storename.com; @news.storename.com; @email.storename.com, etc.

Important: If you manage DKIM for this domain/subdomain in Valimail, you will need to add the DKIM key on your domain's Configuration page in Valimail.

4. You will need to add Omnisend to your Enabled Senders in Valimail for your domain/subdomain. Once added, click Verify records.

5. On the Domain authentication page, you will be provided with the records you need to add to the settings page of your DNS provider.

Note! Once the custom sender domain is set up, warm-up is essential. Otherwise, your deliverability might get much worse than the one you had on a shared sender domain.

6. After the DKIM key is added in Valimail, as the final step you must assign the verified domain/subdomain to your Campaigns or Automations. Click on the dropdown and select both the domain and the subdomain for your Campaigns and Automations.

You can also find the instructions on how to set up DKIM and SPF for Omnisend, here.

You can find more detailed information on how to add a DKIM key in Valimail, here:

Once you establish that Omnisend is an authorized sender for your domain, you will need to add the service in your Enabled Senders.

You will find more detailed information on how to add a service for your domain in Valimail, here:

Note: We encourage you to use the comment section for any useful information about your sending service, such as the name of the service owner, change request ticket numbers, etc.