Yes, rotating SMTPs based on open rate history in adult email lists can help improve delivery and response. When an SMTP gets low engagement, it might affect your inbox rate, and that means fewer people will see your messages. If you track open rates and notice one server underperforming, switching to a different one with better results can keep your campaign going strong. Some use warm SMTPs for high-quality lists and save fresh or less active ones for risky segments. Also, by rotating, you spread the load and reduce the chance of being blocked or flagged. Just make sure you keep a clear log of performance history for each SMTP so you know which ones give the best results. Has anyone here tried this approach with adult lists?