At more than 40 years old, email marketing is still the marketing channel with the highest ROI--especially when it's personalized. Among the many emails that enter inboxes each day, it's no surprise that triggered messages, sent in response to specific consumer behaviors, account for 77% of email ROI, according to the Data & Marketing Association. Every year, personalized marketing automation technology provider Sailthru analyzes 250 retailers' shopping experiences and ranks them based on personalization prowess. The 2019 Retail Personalization Index shows that the retailers with the best email personalization are generally those with strong lifecycle-centric email marketing programs. Welcome emails have a significantly higher open rate than other marketing messages, and the brands that performed best in the Retail Personalization Index know how to capitalize on them.