DomainKeys Identified Mail (DKIM) is a method of digitally signing your email messages to allow authentication. To protect customers from unsolicited email, many ISPs check the domain key used in an email message to determine whether it is spam.
When sending email from your NetSuite production account, using your own domain key helps enhance your reputation as a legitimate marketer.
To create your own domain keys:
A user with an Administrator role (or the Full level of the Set Up Company permission) must go to the Email Preferences page in NetSuite and set up your email domain on the Email Domains (DKIM) subtab.
A person with DNS experience must use the information generated in NetSuite and go to the website of your domain provider to add two CNAME records to DNS.
After completing the setup in NetSuite and adding CNAME records to DNS at your domain provider, email messages you send from NetSuite will be authenticated by your domain keys.