Blog

How long should you test cold email? The 8-week minimum

Most founders test cold email for 3 weeks and quit. That's not a test. The real timeline is 8 weeks minimum, broken down by what to expect each week.

by Quinten Kamphuis 6 min read
cold-email timeline testing fundamentals

Why I tell my clients to fire their cold email agency

Why most cold email agencies underdeliver, what happens after founders fire them, and when keeping the agency is the right call.

by Quinten Kamphuis 6 min read
cold-email agency opinion

Cold email infrastructure: a no-bullshit setup guide for founders

Cold email infrastructure setup explained: domains, inboxes, DNS records, warmup. The full setup in under a week, with no DevOps background needed.

by Quinten Kamphuis 7 min read
cold-email infrastructure setup dns warmup

Cold email for solo founders: a no-bullshit setup guide

Cold email when you're a solo founder: lean infrastructure, realistic time investment, copy that sounds like you, and what to expect at small scale.

by Quinten Kamphuis 6 min read
cold-email solo-founder vertical

Cold email for marketing agencies: how to win clients without outsourcing it

How marketing agency owners run cold email in-house to win new clients: ICP, copy, infrastructure, and why outsourcing your own outbound is the wrong move.

by Quinten Kamphuis 6 min read
cold-email agency marketing-agency vertical

Cold email for freelancers: get clients without an agency stack

How freelancers run cold email at small scale: minimal infrastructure, time-boxed weekly outreach, copy that lands when you're selling yourself.

by Quinten Kamphuis 6 min read
cold-email freelancer vertical

Cost per meeting from cold email: the math no agency will show you

How to calculate cost per meeting for cold email, the formula agencies hope you never run, and the difference between agency and in-house numbers.

by Quinten Kamphuis 7 min read
cold-email cost agency calculator

Cold email best practices: the 4 systems framework (2026)

Cold email is 4 systems working together: infrastructure, list, message, process. The 2026 best-practices framework that explains why most campaigns fail.

by Quinten Kamphuis 7 min read
cold-email framework best-practices fundamentals

Cold email agency vs in-house: the real cost comparison

Should you keep paying your cold email agency or bring it in-house? The real cost, quality, time, and risk breakdown so you can decide.

by Quinten Kamphuis 7 min read
cold-email agency diy cost

How to run cold email in-house (instead of paying an agency $4,500/month)

Why founders are firing their cold email agencies and bringing outbound in-house. The real cost math, the 4-week setup, and what nobody tells you.

by Quinten Kamphuis 10 min read
cold-email agency infrastructure diy reachkit

The Intent Scraping Playbook: How I Hit a 7.6% Reply Rate

The exact evergreen stack — Enrichkit API, Claude Code, Pipekit, Reachkit — that scraped 518 qualified intent leads, landed 39 replies (22 positive), and kept feeding new leads every week on autopilot. Full playbook with prompts.

by Quinten Kamphuis 15 min read
playbook cold email ai lead generation

The AI Scraping Playbook: How I Scraped 77,000 Leads in 60 Days

Zero Apollo. Zero Clay. Zero scraper subscriptions. The exact stack — Claude Code, Enrichkit MCP, Serper.dev, Pipekit, Reachkit — that replaced a $4,500/month agency and scraped 77,000 leads in 60 days. Full playbook with prompts, pipelines, and a 4-week ramp.

by Quinten Kamphuis 16 min read
playbook cold email ai lead generation

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