Test Email Delivery Issues with HTML Content in Beehiiv

🧪 Test Emails Not Delivering When HTML is Included – Seeking Clarification + Advice Hey team — hoping to get some clarity or hear from others if they’ve experienced this: I’m currently running into an issue where test emails from the post editor won’t deliver when they include HTML content (even a basic welcome message with inline styles). ✅ My domain is fully verified — SPF, DKIM, and DMARC are properly set, and Beehiiv shows all domain statuses as Live. 🧪 When I send a test email using plain text, it works fine. But when I use formatted HTML (even simple styling and layout blocks) — the test email just… disappears. Not in inbox, spam, promotions — nowhere. 📥 I’ve tested with multiple addresses, including Gmail and mail-tester, and nothing is received. No bounces, no errors, and mail-tester doesn’t even register the attempt. 📽️ I recorded a quick video showing what happens when I send the HTML test version: https://youtu.be/w2WgFDYNw8I My questions:

Any insight or best practices would really help — I’m trying to QA a campaign, but this issue has me second-guessing deliverability before launch. Thanks so much in advance 🙏