SPF
To authorize Bullhorn to send emails on your behalf you will have to include it in your SPF record. The SPF record mechanisms used by Bullhorn are shown below.
a:outbound5.bullhorn.com
a:outbound3.bullhorn.com
a:outbound2.bullhorn.com
a:o1.email.bullhorn.com
DKIM
Bullhorn requires that the above SPF changes be enabled before DKIM.
Once that is completed, create the following CNAME record with your DNS provider.
Name | Points to |
bh._domainkey | bh._domainkey.bullhornmail.com |
Then contact Bullhorn support and let them know that this record is created, and request to enable DKIM for your account.
Create a free OnDMARC account to test your configuration.