Half-Year Review: Email in the AI Inbox Era
Six months that rearranged the reading layer: Gemini in Gmail, Microsoft rejecting outright, DMARC finally a standard. What the first half of 2026 means for senders.
Strategy
Analysis of communication platform strategy, ecosystem dynamics, messaging trends, market shifts, platform competition, digital communication economics, and the future of messaging technologies and communication infrastructure.
Deliverability Postmortems: Learning From Incidents
The incident is over, placement recovered, and the pressure to move on is enormous. The blameless postmortem practice that converts each incident into prevention.
Writing for AI Readers: Structure When Gemini Summarizes You
Five months of AI Overviews data shows opens up and clicks down: recipients read summaries. How to structure email so the model's version still does your job.
Per-Provider Playbooks: Operating Gmail, Microsoft, and Yahoo Differently
The big three score senders differently, expose different data, and fail in different ways. One operating playbook per provider beats one averaged strategy.
Subaddressing: What Plus Addresses Tell Senders
user+anything@gmail.com is one mailbox wearing labels. How subaddressing works, why blocking it backfires, and what plus addresses reveal about your data flows.
Preference Centers That Prevent Unsubscribes
A preference center offers frequency and topic choices to people about to leave. Where it genuinely saves subscribers, where it violates one-click rules, and the design that works.
Rebrand Migrations: Moving Email Identity to a New Domain
A rebrand replaces the one asset deliverability cannot: your domain's history. The parallel-running plan that carries trust from the old name to the new one.
The Annual Deliverability Audit: A January Checklist
January is the quiet window between peak seasons. The full-stack audit that catches drift in authentication, DNS, list hygiene, and monitoring before it costs mail.
2025 in Email: The Year Authentication Became Mandatory Everywhere
Microsoft joined the mandate, Gmail moved to hard rejection, and DMARCbis reached the finish line. What 2025 changed for senders and what it sets up for 2026.
Q4 Peak Sending: Ramping Volume Without Triggering Filters
Between Black Friday and year end, send volumes triple while filters tighten. How to ramp into peak season so November's volume looks like growth, not an incident.
Email Validation Services: What They Can and Cannot Do
Validation APIs verify syntax, domains, and mailbox existence. Where each check works, where catch-alls and traps defeat them, and where validation belongs in your stack.
Inbox Warmup Tools: Why Automated Engagement Backfires
Warmup services exchange automated opens and replies between member accounts to simulate engagement. Why providers treat this as manipulation and what to do instead.
Seed Testing and Inbox Placement: What the Numbers Really Measure
Seed lists promise a number for the question every sender asks: inbox or spam folder? What placement tests measure, where they systematically mislead, and how to use them.
How AI-Generated Email Content Affects Deliverability
Spam filters do not detect AI authorship. They detect what careless AI usage produces: template sameness, volume spikes, and engagement decline. Where the real risks are.
Migrating ESPs Without Destroying Your Sender Reputation
Switching email providers resets your IPs, your DKIM keys, and every provider assumption about your traffic. A migration plan that carries your reputation across.
Apple Mail Privacy Protection: What Open Rates Still Tell You
MPP fires your tracking pixel whether or not anyone reads the message. How the proxy works, how badly it skews your metrics, and what to measure instead.
Engagement Signals Decoded: What Gmail's AI Actually Measures
Gmail's filtering models weigh replies, moves, stars, and deletes far more than the open rates senders obsess over. What the signals are and how to influence them.
AMP for Email in 2024: Hype, Reality, and Whether to Bother
AMP for Email promised interactive inboxes. Six years after launch, here is who actually supports it, what it costs to run, and when the investment makes sense.
Double Opt-In: Why It's Worth the Drop in Sign-Up Rate
Double opt-in cuts sign-up volume by 20–30%. Here is why the deliverability and list quality trade-off almost always favours confirmation anyway.
Deliverability Incident Response: A Playbook for the First 4 Hours
When email reputation collapses, the first 4 hours determine the recovery timeline. Triage, containment, communication the operational playbook teams actually need.
List Hygiene Beyond Bounces: Engagement-Based Suppression Strategies
Bounce-based list cleaning is decades behind modern deliverability. The 90/180/365-day engagement model, sunset policies, and re-engagement that actually works.
Sending from Subdomains: A Strategic Guide to Domain Architecture
How to architect email subdomains for reputation isolation. The 4-stream model, naming conventions, and why [send.brand.com] beats [mail.brand.com].
DKIM Key Rotation: A Practical Guide for Production Environments
How to rotate DKIM keys in production without breaking signatures. Dual-selector strategy, 2048-bit key sizes, and the rotation cadence that actually works.