Email Deliverability Secrets with Kyle Renfrow (CEO of OptiPub)

Hitting the inbox is harder than ever. In this episode of the Audience Bridge Podcast, I sit down with Kyle Renfrow, CEO & CTO of ESP OptiPub, to talk about what really moves the needle for email deliverability in 2025.

We cover:

✅ How Yahoo & Gmail’s latest changes are impacting inbox placement
✅ Dedicated vs Shared IPs – and the hybrid model most marketers overlook
✅ The deliverability data your ESP isn’t showing you (and why it matters)
✅ Scaling to high volumes without destroying your sender reputation
✅ Actionable steps to protect and improve your domain reputation

If you’re sending newsletters, campaigns, or high-volume email, this conversation is packed with strategies you can implement immediately.

📩 Subscribe to Audience Bridge Insights for weekly deliverability tips: https://www.audiencebridge.io/subscribe

Mentioned in this episode:

📨 Optipub → https://optipub.com/
𝕏 Chris Miquel → https://x.com/miqchris
Kyle Renfrow → https://www.linkedin.com/in/kyle-renfrow/ 

Chapters

• 0:00 Introduction to Optipub and Its Origins
• 2:46 Challenges with Previous ESPs
• 5:13 Optipub's Infrastructure and Deliverability
• 7:45 Client Support and Engagement Strategies
• 10:25 Impact of Yahoo's Algorithm Change
• 13:24 Differentiating Factors of Optipub
• 15:58 Client Migration Process and Support
• 18:25 Relationships with Postmasters and Deliverability Insights
• 23:27 The Evolution of Sender Hub and Yahoo's Data Access
• 26:21 Understanding Email Deliverability and Engagement Management
• 29:37 Navigating Open Rates and Engagement Metrics Post-iOS 15
• 31:31 Leveraging AI for Enhanced Marketing Strategies
• 35:00 Balancing Monetization and Subscriber Engagement
• 37:30 The Impact of New Email Platforms on Subscriber Behavior
• 41:53 Future Trends for Email Service Providers
• 47:41 Key Takeaways and Final Thoughts