Email Marketing and Newsletters

beginner7 min read · updated 2026-06-20

Email Marketing and Newsletters

Email is the oldest channel on the internet and still the highest-leverage one for an independent operator. You own the list. No algorithm sits between you and your audience, and no platform can throttle your reach overnight. That ownership is exactly why email marketing keeps outperforming every other digital channel on return.

Why this niche is worth your time

The global email marketing market was roughly $12.84B in 2025 and is forecast to grow at about 10.82% CAGR through 2031. The reason businesses keep spending: email returns an average of $36 for every $1 spent — the best ROI of any channel. With roughly 4.5 billion email users worldwide, the audience is effectively everyone with an internet connection.

The newsletter side has its own gold rush. beehiiv alone reported over 75,000 newsletters and 350 million monthly readers on its platform in 2025, with more than $25 million in publisher revenue generated that year. Individual operators are building real businesses on top of it.

The three ways to make money here

• Run your own paid/sponsored newsletter — pick a tight niche, grow a list, monetize through sponsorships, paid subscriptions, or your own products. Highest upside, slowest ramp.
• Sell email as a service (agency / freelance) — manage email programs for e-commerce brands and SaaS companies. They have the lists already; they are leaving the $36-per-dollar return on the table. Fastest path to first dollar.
• Build email tooling — templates, deliverability audits, automation setups, or micro-SaaS around an underserved workflow. Most technical, most defensible.

Market reality (read before you commit)

• TAM ≈ $12.84B (global email marketing spend, 2025).
• SAM ≈ $1.28B (the SMB / English-language slice a small operator can plausibly serve) — $1.28B.
• SOM ≈ $6.4M for a single focused operator over ~3 years — $6.4M.
• Saturation: 62/100 — the software layer is brutally competitive; the audience and services layers are not.
• Startup cost: $100 — this is one of the cheapest niches to enter.
• Time to first dollar: ~30 days.

The takeaway: do not try to compete on tooling unless you have a sharp wedge. Compete on a niche audience nobody is serving, or on outcomes (revenue per send) that brands cannot get from a tool alone.

How to start: a numbered playbook

This playbook targets the fastest, lowest-risk path — a niche newsletter you can later monetize, with an agency-services side door for income while you grow.

• Pick a niche you can speak to weekly. Narrow beats broad. "Email tips" is dead on arrival; "weekly deal flow for self-storage investors" is a business. Choose something with (a) buyers with money and (b) a topic you will not get bored of in six months.

• Validate demand before you build. Search whether 3-5 existing newsletters already serve adjacent audiences. Competition is proof of money, not a reason to quit — it tells you a list is monetizable. If there is literally nothing, that is a warning, not an opening.

• Buy a domain and pick an ESP. Get a custom domain (~$12/year) so you are not stuck on a platform subdomain. Start on a free tier: beehiiv, Kit (formerly ConvertKit), or MailerLite all let you reach roughly the first 1,000 subscribers free. Pick beehiiv if you want built-in monetization and growth tools; pick MailerLite/Kit if you want simplicity.

• Set up authentication on day one. Configure SPF, DKIM, and DMARC for your sending domain. This is non-negotiable — without it your emails land in spam and your whole business dies quietly. Most ESPs walk you through it; do not skip it.

• Write 3-4 issues before you launch. Publishing on a schedule is the entire game. Having a buffer means one bad week does not break your streak. Define your format and cadence (weekly is the sweet spot) and stick to it.

• Build the list with one acquisition channel at a time. Pick a single source — a personal LinkedIn/X audience, a lead magnet, cross-promotion (beehiiv Boosts), or a niche community — and go deep before adding a second. Spreading across five channels at once means you learn nothing about any of them.

• Monetize once you clear ~1,000 engaged subscribers. Below that, focus on growth and open rates. Above it, you have three levers: sponsorships (sell ad slots), paid tier (premium content), and your own product/service. Sponsorships are usually the fastest first dollar.

• Run the agency side door in parallel. While your list grows, sell email-management or a one-time "deliverability + revenue audit" to 2-3 e-commerce or SaaS brands. This funds your time, sharpens your skills, and the case studies make your own newsletter more credible.

Common ways people fail

• No authentication → everything lands in spam, sender reputation tanks, and the account is effectively dead. Fix SPF/DKIM/DMARC first.
• Buying or scraping lists → spam complaints, blacklisting, and legal exposure (CAN-SPAM, GDPR). Always grow with opt-in.
• Inconsistent cadence → the list goes cold and unsubscribes spike when you finally do send. Pick a schedule you can sustain forever, not one that looks impressive for a month.
• Monetizing too early → shoving ads at 200 subscribers burns trust before you have any. Earn the audience first.

The one-line thesis

You own the asset, the ROI is the best in marketing, entry cost is near zero, and the moat is a niche audience nobody else is serving. Pick the niche, send every week without fail, and let the list compound.