Email Deliverability7 min read
Perfect authentication, and it still reads like spam
A Dick's Sporting Goods campaign passes SPF, DKIM, DMARC reject and one-click unsubscribe. Read it as text and you see what the filters and AI summaries see instead.
Inbox Thinking
The Alterable blog on email deliverability, personalization, and design. For marketers who want to understand the inbox, not just use it.
Email Marketing7 min read
What an AI marketing agent can't do for your email program
Every major platform shipped an AI marketing agent this year. Here's what they genuinely handle, where they fall apart, and what to fix in your email program first.
Email Deliverability7 min read
Gmail is starting to care who you are, not just whether you signed the envelope
Gmail's Verified Sender Program launches September 8. It ties inbox placement to confirmed identity, not just authentication. Here's what that shift means for senders.
Email Marketing9 min read
Best Free Email Countdown Timer Services in 2026 (Honest Review)
Compare the best free email countdown timer services in 2026, including free tier limits, design customization, evergreen support, and ESP compatibility.
Email Marketing7 min read
Interactive Email Was Supposed to Be AMP. It Became Something Else Entirely.
AMP promised interactive email in 2018, but fewer than 5% of senders ever used it. What actually went wrong, and where interactivity ended up instead.
Email Personalization9 min read
Dynamic Email Content: What It Is, How It Works, and When It's Worth It
Dynamic email content changes per recipient, or at the moment of opening. Here's how both kinds work, what email clients allow, and when it's actually worth doing.
Email Marketing4 min read
AI Email Agents and the Future of Email Marketing
HubSpot and Klaviyo now ship AI agents that run campaigns on their own. What agentic email means for marketers, and who is accountable when AI hits send.
Email Marketing7 min read
The false urgency email just got expensive
A false urgency email can now trigger per-message statutory penalties. What the Washington CEMA rulings changed and how to keep your subject lines safe.
Email Marketing6 min read
The informed non-opener: why your best subscribers are invisible now
AI email summaries let subscribers skip the open entirely. Here's why the open rate is breaking, and how to measure engagement that AI can't see.
Email Deliverability5 min read
Gmail now tells you if people actually want your email. Here's how to listen.
Google Postmaster Tools' new Deliverability Analysis tells you whether Gmail thinks people want your email. Here is how to read it and act on it.
Email Design8 min read
Email Design Trends: What Marketers Need to Know for 2026
The email design trends actually holding up in 2026: what stuck, what quietly faded, and how to tell a real pattern from a to-do list.