SPF(supported) / (dedicated subdomain) DKIM(not supported)
This article covers the SPF authentication process for BigCommerce and how it is managed in Valimail. Only one of the two authentication methods is required for an email to pass DMARC.
BigCommerce does not support DKIM signing.
Configuring SPF authentication for your BigCommerce emails
Once you establish that BigCommerce 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.
Enable SPF alignment in BigCommerce for your domain
You may notice that BigCommerce emails are not authenticated via SPF, even after you have added BigCommerce to your domain's configuration. This is likely caused by BigCommerce not sending SPF aligned-mail.
ADDING SPF BigCommerce RECORDS
SPF records are added within a TXT record. Select the Web Hosts tab in the DNS Settings area.
Locate the existing TXT record containing v=spf1. Add the SPF record to the existing Value text.
Default -> v=spf1 +a +mx include:_spf.bigcommerce.com ~all
More details on how to achieve SPF alignment for BigCommerce can be found in the article here.