What are the key principles of effective email marketing according to Jason Calacanis?

According to Jason Calacanis, effective email marketing requires personalization and clarity about your product. He emphasizes being personal with customers, reminding them what your product does, and making communication interesting. Using the example of Snapcycle, he criticizes generic emails that fail to explain the product's purpose, which can lose potential customers. Jason shares his experience at Intercom, where he personally reached out to beta customers with mockups and screenshots showing how the product would look. This approach yielded high conversion rates because it demonstrated value and addressed specific customer problems. Rather than sending impersonal mass emails, he recommends creating clear, engaging communications that show genuine care for recipients.