PostaSend Blog

Product updates, engineering deep-dives, and tutorials from the PostaSend team.

Tutorial

Why DMARC Still Trips Up Engineering Teams in 2025

DMARC has been around for over a decade, but we still see it misconfigured on the majority of new PostaSend domains. This guide breaks down the record syntax, common pitfalls, and a safe rollout strategy.

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Priya Nair
April 30, 2025
Engineering

What We Learned Handling 100+ Bounces per Second

At scale, bounce handling is not just about suppression lists — it's a real-time signal processing problem. We explain how we built our bounce classification engine and what signals predict list quality.

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James Okonkwo
April 11, 2025
Product Update

PostaSend Q1 2025 Deliverability Report

Every quarter we publish aggregate deliverability metrics across our platform. In Q1 2025, our customers achieved an average 99.2% inbox placement rate across Gmail, Outlook, and Yahoo — here is how.

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Saoirse Murphy
March 31, 2025