According to Return Path, recent shifts in how ISPs process and deliver email have resulted in as much as 20 percent of permission-based email ending up in the spam folder. Some ISPs, such as Gmail, remain difficult to achieve higher inbox placement rates. Incidentally, while optimizing for Gmail, StrongMail clients have noticed positive results with other ISPs. StrongMail deliverability expert Sean Wirt explored Gmail's strict inbox placement rules, offered creative ideas to address them and explained how Gmail tactics can improve your results at other ISPs. Key Take-Aways: - Gmail's email engagement filtering – Beyond opens and clicks - Engagement ideas to maximize inbox placement - Tactics that improve Gmail reputation can improve reputation at other ISPs