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Deliverability, in plain English.
How cold email actually lands in the inbox — authentication, warmup, reputation, and the APIs that send it. No fluff, no growth-hacking myths.
15 articles
Email Warmup Strategies: How to Land in the Inbox, Not Spam (2026 Edition)
Learn the proven email warmup strategy for 2026. Avoid spam filters, build reputation, and ensure cold emails land in the inbox with actionable steps.
2026-09-28 · 5 min read
The Ultimate 2026 Guide to Cold Email Deliverability: Avoiding Spam Traps and Blacklists
Learn how to master cold email deliverability in 2026. We break down authentication, reputation, and the strict rules from Google and Yahoo to keep your inbox warm.
2026-09-28 · 5 min read
Mastering SPF, DKIM, and DMARC for Cold Email Deliverability in 2026
Learn how to set up SPF, DKIM, and DMARC for cold email in 2026. Avoid spam folders with our practical, step-by-step authentication guide for deliverability.
2026-09-28 · 4 min read
Why your cold emails go to spam (and how to fix it)
Spam placement is rarely about one bad word. It is authentication, reputation, warmup, and hygiene — in that order. Here is how to diagnose it.
2026-06-26 · 6 min read
SPF, DKIM, and DMARC: the setup that lands in the inbox
SPF says who can send, DKIM proves nothing was tampered with, DMARC ties them together and tells receivers what to do. Here is the whole picture.
2026-06-24 · 7 min read
How to send cold email programmatically with an API
You can send transactional email from your app in five minutes — but try cold outbound and you will get banned. Here is the layer built for it.
2026-06-20 · 6 min read
Cold email via MCP: let your AI agent send outbound
AI agents can write the pitch. The missing piece is letting them send it — safely, through warmed infrastructure. That is what an MCP deliverability server is for.
2026-06-16 · 5 min read
Email warmup explained: ramping a new sending domain
A new domain has zero reputation. Warmup builds it gradually so receivers learn to trust you — before you send a single real campaign.
2026-06-12 · 5 min read
Cold email deliverability checklist for 2026
One checklist, four layers: authentication, warmup, reputation, suppression. Skip any one of them and the others cannot save you. Here is the full setup.
2026-06-10 · 8 min read
How sender-reputation scoring actually works
Reputation is not a single number. It is a bundle of signals a mailbox provider watches per domain and per IP — and crossing one threshold can silently move you to spam.
2026-06-08 · 7 min read
GDPR and cold email: what's actually allowed
GDPR does not ban cold email outright, and it is not a US-only concern either. Here is what the regulation actually asks of B2B outbound — and what it does not permit.
2026-06-06 · 7 min read
Per-send vs per-seat pricing for cold-email tools
Per-seat pricing punishes you for adding a teammate. Per-send pricing punishes you for sending more. Neither is universally better — it depends on how your usage actually shapes up.
2026-06-04 · 6 min read
What is a warmed sender pool?
A single warmed domain solves one problem. A managed pool of them solves the recurring one: never running a real campaign on a domain that has not earned trust yet.
2026-06-02 · 6 min read
MCP servers for cold email: what they actually do
MCP is not magic — it is a standard way to hand an AI agent a defined set of tools. For cold email specifically, that raises one obvious question: which tools should an agent actually be trusted with?
2026-05-30 · 6 min read
Evaluating tools rather than reading up on them?
Honest comparisons & alternatives →