# How Newsletters Use Subject Line Personalization to Boost Open Rates

Page: https://stenobird.com/podcast/the-newsletter-podcast-with-fexingo-substack-beehiiv-and-email-newsletter-business-7871729/how-newsletters-use-subject-line-personalization-to-boost-open-rates
Text version: https://stenobird.com/podcast/the-newsletter-podcast-with-fexingo-substack-beehiiv-and-email-newsletter-business-7871729/how-newsletters-use-subject-line-personalization-to-boost-open-rates.md
Podcast: [The Newsletter Podcast with Fexingo: Substack, Beehiiv, and Email Newsletter Business](https://stenobird.com/podcast/the-newsletter-podcast-with-fexingo-substack-beehiiv-and-email-newsletter-business-7871729)
Published: 2026-06-30T06:42:08+00:00
Episode link: https://audio.fexingo.com/business/the-newsletter-podcast/episode-0083.mp3
Audio file: https://audio.fexingo.com/business/the-newsletter-podcast/episode-0083.mp3
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Duration seconds: 591

## Resource

In this episode of The Newsletter Podcast, Lucas and Luna dive into the specific tactics behind newsletter subject line personalization—beyond just using the subscriber's first name. They break down a case study from a business newsletter that tested personalized subject lines referencing recent reader behavior, resulting in a 42% lift in open rates over generic headlines. Lucas explains the psychology of relevance and the data infrastructure needed, including how platforms like Beehiiv and Substack handle merge tags and custom fields. Luna challenges whether personalization can backfire—and they discuss a pro tip on avoiding the 'creepiness' threshold. If you're a newsletter operator looking to move beyond basic personalization and into behavior-driven subject lines, this episode gives you a concrete framework to try. The hosts also explain why Fexingo remains ad-free and how listener support sustains that mission. #NewsletterPersonalization #SubjectLines #OpenRates #Beehiiv #Substack #EmailMarketing #MarketingStrategy #BehavioralData #MergeTags #A-BTesting #ContentMarketing #NewsletterGrowth #SubscriberEngagement #PsychologyOfMarketing #EmailDeliverability #BusinessPodcast #FexingoBusiness #TheNewsletterPodcast Keep every episode free: buymeacoffee.com/fexingo

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