Automated Email Offer System Setup

I need an efficient email system to send property sale offers to homeowners. Each email will be customized with different sale prices and property addresses.

Key Tasks:
- Configure or set up a pre-built mail merge system.
- Ensure the system is whitelisted for better view rates.
- Weekly email blasting using the configured system.

Requirements:
- Expertise in email platforms (Mailchimp, SendGrid, etc.)
- Experience in mail merge and email automation
- High deliverability and ease of use

Please provide an implementation plan and showcase any relevant experience.