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Blazalek.com: Email Deliverability Specialist
I help SaaS and e-commerce teams land in the inbox: email authentication (SPF/DKIM/DMARC), sender reputation, and list hygiene. Deliverability audits, setup, consulting and training.
About Wojtek Blazalek, email deliverability & lifecycle expert
Wojtek Blazalek: 15+ years building, fixing and scaling email. Deliverability, lifecycle marketing, system implementation and platform migrations, plus talks, interviews and publications.
Contact
Get in touch about email deliverability: book a call, send a message, or call directly. You reach the specialist, not a call center.
Urgent help with company email problems
Direct help when messages are rejected, a domain is blacklisted, or an email provider blocks sending. Talk to a specialist, not a call center.
Deliverability questions, answered
The questions I hear most about getting email into the inbox, and how I work. Can't find yours? Book a call.
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How blazalek.com handles analytics, form submissions, bookings, technical logs, language preferences, and your data-protection rights.
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The deliverability guide
Production-grade email systems
A provider-agnostic, ten-chapter guide to email deliverability, transactional and marketing email, compliance, list hygiene, reliability and webhooks.
Email Types: Transactional vs Marketing
The core distinction between mail a user is waiting for and mail you want them to read, plus the legal framing, the hybrid gray area, and how the split shapes your sending infrastructure.
Transactional Email Catalog
A practical catalog of transactional emails by category, plus ready-made sets per app type: what to build, when to send and what each email must contain.
Deliverability
The four pillars of reaching the inbox: SPF/DKIM/DMARC authentication, sender reputation, bounce & complaint handling, and DNS architecture that protects transactional mail.
List Management
Keeping lists clean: suppression lists, automated hygiene, data retention, and separating transactional from marketing streams so you don't erode sender reputation.
Transactional Email Design
How to build the mail users expect, clear, fast and action-oriented: subject lines, structure, mobile-first layout, OTP/CTA display and error handling.
Email Capture
Collecting addresses responsibly: client- and server-side validation, double opt-in verification, dark-pattern-free form design and proper consent capture.
Marketing Emails
Running a consent-based program: how to collect opt-in, make unsubscribing painless, design valuable messages and keep the list healthy so mail keeps landing.
Compliance
A summary of the key regimes (CAN-SPAM, GDPR, CASL and others): unsubscribe rules, consent records and the technical headers now required of bulk senders.
Sending Reliability
Sending as a distributed-systems problem: idempotency (no duplicates), retry with backoff, error-code handling and queuing decoupled from the request path.
Webhooks & Events
The other half of the email story: event types, signature verification, non-negotiable idempotent processing, and reacting to bounces and complaints to keep suppression accurate.
Case studies
Deliverability work, start to finish
A closer look at how I actually work through real projects, not pitches. Each one walks through the process rather than the private details, across very different kinds of senders.
A newsletter system built from zero, done right · Easy.Tools
I built Easy.Tools a full newsletter and lifecycle sending system from scratch: isolated infrastructure, clean authentication and a monitored model they run themselves.
Scaling toward a million sends a day on a new engine · Youmoney
How I moved a high-volume lending marketplace onto a new event-driven sending engine and rolled it out safely, phase by phase.
Rescuing sender reputation and leaving the playbook behind · Tagvenue
I recovered a busy marketplace's damaged sender reputation and handed over the routines that keep its mail in the inbox.