This option will change the DNS records that you point at Send Grid for your domain, allowing the responsibility of updating the records to pass through to Send Grid.
This means that DKIM and SPF records will all be handled by Send Grid once this whitelabel is verified.
It is important to remember that you will always be provided with a custom DKIM signature, regardless of whether or not you use automated security.
However, with automated security turned off, Send Grid will not automatically update your DKIM signature whenever you make a change to your account that could affect your DNS records (like adding a dedicated IP).
This should help increase your deliverability rates and reduce your potential for spam reports.
For example: marketing.yourdomain.com, billing.yourdomain.com, and support.will all contribute to, and share the reputation of, Allows you to add a new domain to your whitelabel options.Your default whitelabel is your fallback when you send emails.Your root domain should match your FROM email address.If you are sending from [email protected], then you should whitelabel subdomain.example.com, so the root domains match.