Use WP Leads with drip marketing?

You would need to use a real email service provider.

We recommend using mailchimp + https://www.inboundnow.com/market/mailchimp-integration/

WordPress core mail is not very good with deliverability and tends to end up in peoples spam filters

Thanks!
Can I make it happen with the Mailchimp basic service (free)?

Yeah I believe the free mailchimp service gives you API keys

Check in your account settings.

Free mailchimp doesn’t do drip campaigns though

Thanks, I checked it out and can take it from here! ??