DKIM and DMARC Records

Overview

DKIM (DomainKeys Identified Mail) is an email security standard designed to ensure that emails aren't altered in transit between the sending and recipient servers. DKIM uses public-key cryptography to sign emails with a private key as it leaves a sending server. For more information, access DKIM Records.

DMARC (Domain-based Message Authentication, Reporting & Conformance) makes it easier for Internet Service Providers (ISPs) to prevent malicious email practices, such as domain spoofing. This allows for email senders to specify how to handle emails that aren’t authenticated using SPF of DKIM. For more information, see DMARC Records.

Updating email records is usually done through your domain host. You may need to contact your IT or domain host support for assistance in performing this update.

Updating Your DMARC Records

The steps below are general, and may not apply to your specific domain host. If you need further clarity or assistance in the steps below, please contact your domain registrar support.

1. Log into the administrative section of your domain.
2. Locate the DNS Records update section in the admin tool.
   • If your configuration already has a value for _dmarc.your_domain.com (where “your_domain.com” represents your specific domain name), no additional changes are necessary.
   • If this value does not exist, create a new record of type TXT with the following values (replace “your_domain.com” with your specific domain name:
     • Name: _dmarc.your_domain.com
     • Contents: v=DMARC1; p=none;

Enabling DKIM on Mass Mails

The below steps are general and may not match your specific domain host. If you need assistance in performing the below steps, contact your domain support.

To enable this, you’ll need to use Bullhorn’s SPF record listed in this file. For more details on SPF records, Updating Your SPF Records.

Create a CNAME record

1. To create a CNAME record, log in to your DNS Hosting Provider and locate the CNAME section in the admin tool.
   • Each hosting provider has a different interface, but this is typically found under DNS. Example: Click Manage > Click DNS > Add CNAME record.
     
     
2. Format the CNAME record as follows, replacing mydomainname with your domain name:
   • Host: bh._domainkey.mydomainname.com
   • Points to: bh._domainkey.bullhornmail.com
     
3. Contact Bullhorn Support and let us know you are ready to enable DKIM on mass mails to be DMARC compliant and we’ll complete the process on our end.