Wojciech Blazalek

Wojtek Blazalek is an email deliverability and infrastructure expert with more than 15 years of experience building, fixing, and scaling high-volume email systems. He has led deliverability at GetResponse, worked on email products at Woodpecker, and contributed to systems handling more than 2 billion messages per month. His expertise covers inbox placement, sender reputation, SPF, DKIM and DMARC, ESP migrations, lifecycle email, abuse prevention, and the practical use of AI in phishing and spam detection. His work includes an anti-abuse system that reduced abuse by 40% and an LLM-based phishing classifier that improved detection accuracy by 82%. Wojtek is available to journalists for clear, technically grounded commentary on email deliverability, authentication, spam, phishing, sender r...