Building an email list of your customers starts with offering value. You should create an attractive lead magnet like an eBook or discount coupon. Place sign-up forms on your website and checkout pages. You can offer incentives for customers to join your list. You should also use social media to promote your email sign-up. You can run contests or giveaways to increase sign-ups. You must focus on delivering value through your emails. Regularly send relevant content and special offers. You should also ask customers for feedback and engage with them. Building trust is key to growing and maintaining your email list.