Blog
Notes from the
honest side of email
Deliverability, honest analytics and outreach craft — written in plain language, with no growth-hack snake oil.
Earlier articles
253 articles
StrategyAnalysis7 min
Agencies: build white-label AI workflows on the Norbelys MCP server
One workspace per client solves the pricing problem. The MCP server solves another: how an agency builds its own tooling instead of reselling a vendor dashboard.
AI7 min
The guardrails an AI operator needs before it touches your sending domain
Rate limits, approval gates, and evidence requirements for letting an AI agent run cold email campaigns — and the signals that should never be fully automated.
Developer8 min
Building a Slack alert for new replies with the Norbelys API
A practical build: poll GET /v1/messages?direction=inbound for unread replies and post them to Slack, without duplicate alerts or a second inbox to babysit.
Strategy7 min
Running cold email for multiple clients? One workspace per client, one flat bill
Agency cold email math breaks when tooling costs scale with every client. How a workspace-per-client model under one flat bill changes the day-to-day workflow.
DeliverabilityAnalysis7 min
Which email client actually matters in 2026 (and why the answer is volatile)
Apple Mail and Gmail account for roughly 90% of tracked opens in 2026, per Litmus, but Apple's share swings 20 points month to month. What that means for testing.
DeveloperAnalysis7 min
What should an AI agent be allowed to read and write in your CRM data?
AI agents need different guardrails for CRM data than for sending. A practical framework for what to let one read, write, bulk-edit, or never touch.
StrategyAnalysis7 min
Norbelys for technical founders: script your outbound instead of clicking it
If you'd rather write a script than click a dashboard, the API, CLI, and SDKs are the real product. A case for solo founders running their own outbound.
Deliverability8 min
One-click unsubscribe: the header Gmail and Yahoo now require
The List-Unsubscribe headers Gmail and Yahoo made mandatory for bulk senders, what actually satisfies the rule, and how enforcement tightened heading into 2026.
StrategyField note7 min
Why 'I'll get back to you tomorrow' stopped being an acceptable answer
Remote and hybrid work quietly rewrote how fast a reply is expected. The data shows nobody actually voted on the new rule — it just became the norm.
StrategyAnalysis8 min
The state of cold email in 2026: what actually changed
Sender-rule enforcement got teeth, Gmail's spam classifier got upgraded, and AI drafting went mainstream — a grounded look at what changed in cold email this year.
Strategy7 min
Switching from Instantly to Norbelys: a practical migration guide
Moving off Instantly's Outreach + Leads + CRM stack? What maps to what, what to export first, and what genuinely changes on day one — grounded in real pricing.
Strategy7 min
Switching from Smartlead to Norbelys: what to export, what maps, what changes
Smartlead is a genuine volume machine. If honest analytics or a flatter bill are why you're leaving, here's the practical migration checklist.