What Are DNS Records?
DNS (Domain Name Server) records are strings of text stored online in association with your domain registry. These records contain instructions to help internet browsers reach your website servers, and also provide authentication and instruction for services associated with your online activity (including email).
For your Cortex integration DNS records enable our click tracking and branded unsubscribe links, establish SPF and DKIM email authorization, and allow for DMARC policies. (more about SPF, DKIM, and DMARC)
Domain registrars are regulated by the global system of Regional Internet Registries.
How Do I Create/Edit/Manage My DNS Records?
DNS records can be set and edited inside your provider's account with relative ease. Instructions for popular providers are linked below:
What DNS Records Do I Need for Cortex?
You will need 6 records for your Cortex integration. 5 CNAME records and one TXT record. Examples are shown below:
|TXT||yourbrand.com||v=spf1 include:sendgrid.net include:mail.zendesk.com include:_spf.google.com ~all|
rs.yourbrand.com - this enables our click tracking in emails
unsub.yourbrand.com - this enables unique unsubscribe links for your brand
rsmail.yourbrand.com - this enables us to "sign" your emails as an authorized sender
yourbrand.com / v=spf1 - This is your SPF record to authenticate mail senders. You will need to add "include:sendgrid.net" to your existing record.
Contact tech support if you do not know your domain key values.
What about DMARC?
DMARC is an optional record which sets policies for Mailbox Providers to follow if any message from an @yourdomain.com email does not pass SPF and DKIM authorizations.
These policies are designed to catch messages pretending to come from your brand (such as phishing attacks). DMARC records can contain varying levels of instruction ranging from "none" (do nothing) to "reject."
An example record is shown below:
|TXT||_dmarc||v=DMARC1; p=none; fo=1|
Most providers will use _dmarc, _dmarc.@, or _dmarc.yourbrand.com for the host.
More information about DMARC: