What is the cname field otz._domainkey & 2nd a txt value I don't understand?

Technical Q&A

Topic summary

A user has discovered three CNAME records in their domain DNS settings (otz._domainkey, otz2._domainkey, otz3._domainkey) and is uncertain whether all are necessary or how they were created.

Context:

  • The records appear related to Shopify’s email system, used only for automated transactional messages
  • The user relies on Mailerlite for their primary email campaigns
  • They also found a TXT record with an approximately 100-character p= field that they don’t understand

Technical Details:

  • DKIM (DomainKeys Identified Mail) records are visible, pointing to Shopify’s email infrastructure (dkim1.c0c8bfda8874, email.myshopify.com addresses)
  • The user couldn’t find relevant information in help documentation

Status: The question remains unanswered, with the user seeking clarification on whether all three CNAME records are required and explanation of the mysterious TXT record value.

Summarized with AI on November 13. AI used: claude-sonnet-4-5-20250929.
1

In my Domain DNS records I have 3 versions of this cname key and I’m not sure that all three are needed, nor do I know how they got there. I’m guessing they are used for shopify’s email system, which is only used for automated messages when a sale is made, etc. I use Mailerlite for emails I send. I looked in the helps but couldn’t find anything. Any advice?

otz._domainkeyotz2._domainkeyotz3._domainkey

dkim1.c0c8bfda8874.p162.email.myshopify.com

Actions

dkim2.c0c8bfda8874.p162.email.myshopify.com

Actions

dkim3.c0c8bfda8874.p162.email.myshopify.com

I also have txt record that looks like what I show below except the p= field is about 100 characters long and I have no idea what this is. Any thoughts on it:

20210806173304pm._domainkey

k=rsa; p=MIGfMA0GCS