The email stack

Writings on deliverability, authentication & infrastructure

Practical, field-tested articles across five areas: DMARC/BIMI & authentication, deliverability, email infrastructure, email marketing, and industry news & compliance.

DMARC & BIMI

Moving from p=none to p=reject without breaking legitimate mail

7 min read

Infrastructure

PowerMTA VMTA design for IP reputation isolation

9 min read

Deliverability

Passing Gmail and Yahoo sender requirements in 2026

6 min read

DMARC & BIMI

BIMI and VMC explained: your logo, verified, in the inbox

8 min read

Email marketing

Why open rates lie after Apple Mail Privacy Protection

5 min read

Infrastructure

IP warm-up schedules that actually work at scale

7 min read

News & compliance

This month in email: sender requirement changes to watch

4 min read

Deliverability

The SPF 10-lookup limit: why it breaks and how to fix it

6 min read

Infrastructure

On-premise email platforms: when owning your stack makes sense

8 min read

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