Single Premium Whole Life - Thinking of Doing a Mailer

I am a Final Expense Agent considering doing a Single Premium Whole Life Mailer using a list of people who own Bank Certificates of Deposit. My big question is how do I approach the lead once I do the mailer. With Final Expense direct mail leads, we door knock. I'm not sure this is the right approach for SPWL. Has anyone ever done a mailer for SPWL and if so, how did you contact the leads who mailed back the card?

I will be using a mailer from one of my carriers.

Thanks in advance for your help.

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