Marketing & GrowthFree tool
Newsletter Edition Writer From Your Notes
A full draft of this week's newsletter from your notes and links, with three subject lines, matching preview text and one call to action.
Free to start · Opens in your River workspace, ready to edit and share
How to write a newsletter
A newsletter is an email you send to subscribers on a regular schedule. To write one, start from what you have this week (notes, links, a decision you made) and put the most interesting item in your first two sentences. Give each idea a short section under a heading that says what it holds, and say why every link is worth a click. End with one request, and send it under a subject line that says what's inside.
One principle matters most: each edition has to earn the next open. Nielsen Norman Group's 2017 research on marketing email found that when people find a newsletter irrelevant, most ignore future emails rather than make the effort to unsubscribe1. So an edition readers don't care about often doesn't show up as an unsubscribe. It shows up as a reader who quietly stops opening.
Pick one lead
Before you write, list everything you could include this week. Then choose the most specific item, the one only you can tell. It might be a decision you made, a number that surprised you, or a mistake and what it taught you. That item leads, even if it isn't the newest.
Rank the rest by importance. Newspapers call this the inverted pyramid: the Purdue Online Writing Lab describes the most fundamental facts at the top and the rest in order of importance2. That way, an editor who needs to cut can cut from the bottom. When your edition runs long, do the same.
What leads in each kind of edition
| Edition | Lead with | Then |
|---|---|---|
| One main essay | Your decision, finding or argument, in one sentence | Why you think so, what happened and what readers can do |
| Link roundup | The one link you'd send if you could send only one | A few more links, each with a line of your own |
| How-to or tips | The problem the tip solves | The steps, then the mistake people make most often |
| Shop or company update | The change that affects readers most | What it means for them and the key dates, then smaller news |
| A mix | Your strongest item of any kind | Shorter sections in order of importance |
Keep a running list of possible leads between editions, so send day starts with a choice instead of a blank page. An editorial calendar gives each idea a date.
Open your newsletter with the point
Most readers skim. In a 2006 eyetracking study of 42 people, Nielsen Norman Group found that readers spent an average of 51 seconds on a newsletter after opening it3. They read only 19% of newsletters in full. Introductions went unread by 67% of readers, though they averaged just three lines.
So skip the warm-up: no apology for being late, no weather report, no "Hope your week is going well." State the lead plainly in your first two sentences, then say in one line what else the edition holds. A reader who stops there still got the news.
Write sections a skimmer can follow
Give each idea its own short section, written for someone reading on a phone between other things.
Make the heading do the work
Say what the reader gets, key words first. A heatmap from the same study shows readers concentrating on the first two words of the headlines3. "Packing mugs so they arrive in one piece" tells a skimmer more than "Quick tip."
Read before you link
Open every page you share, then add a sentence on why it's worth a click. A link with nothing of yours beside it is a bookmark, not a recommendation.
Add your take
It's the part readers can't get anywhere else, so write it the way you'd explain it to one subscriber. If several people write the newsletter, a short brand voice guide keeps it sounding like one sender.
Ask for one thing
Close with one request that fits this week, such as a reply, a forward or the sale that ends Friday. Ask for four things at once and they compete.
Size it to the material
Stop when you've said what you came to say. Padding a thin week to match a busy one weakens every section.
Write the subject line and preview text last
Write these once the edition is finished, so they describe what's in it. Nielsen Norman Group's research with hundreds of emails found readers prefer subject lines that say what the newsletter contains over ones that give its name or date4. One of its examples, "April 2014 eNewsline," says nothing about what's inside. Put the key words first and keep to 40 characters, as NN/g advises, since many inboxes show fewer.
Preview text is the line most inboxes show beside or under the subject, so set it yourself. Litmus, which sells email testing software, notes that inboxes otherwise pull it from the first lines of copy in your email5, or sometimes from an image's alt text. It recommends keeping preview text under 90 characters. Use it to add what the subject leaves out, not to repeat it.
A pottery shop's notes: free shipping ended March 1; orders fell two weeks, then recovered; average order now bigger; new postage rates; mug packing tip; spring sale ends Friday.
Subject: Why we stopped free shipping
Preview text: Orders fell for two weeks. Then the average order grew.
Opening: We stopped offering free shipping on March 1. Orders fell for two weeks, then came back, and the average order is now bigger than before. Below: why we did it, what it means for your next order, and how we pack a mug so it arrives in one piece.
- Says what's inside. The subject names the news in 28 characters, so it fits a narrow inbox.
- Adds, doesn't repeat. The preview text gives the result that the subject holds back.
- Lead first. The first two sentences carry the decision and what happened. One line previews the rest.
Check it before you send
In the US, an edition that promotes what you sell may count as commercial email under the CAN-SPAM Act. For messages that mix promotion with other content, the FTC's guide looks at the subject line, where the promotion sits and how much of the message it fills6. If a reader would take the subject line as promoting something, or the body as mainly promotional, the law applies.
In that case, the subject line must accurately reflect the content. Each edition also needs your valid postal address and a clear way to opt out, and you must honor opt-outs within 10 business days. Check that your email platform's footer covers both.
Readers outside the US?
Other countries set their own rules for marketing email. If your list spans several, ask a lawyer which rules apply before you send.
Before you send
- The lead is in the first two sentences
- Each heading says what its section gives the reader
- You've read every page you link to, and said why it's worth a click
- The subject line says what's inside, and the preview text adds to it
- There's one call to action
- A promotional edition shows your postal address and an unsubscribe link
- A test send reads well on your phone
Judge it by clicks and replies
Don't judge an edition by its open rate. Apple introduced Mail Privacy Protection in 2021 to help users prevent senders from knowing when they open an email7, so your open count can't reliably tell you who read it. Clicks and replies record what readers actually did.
After each send, note which links people clicked and what they wrote back. Over a few editions, a pattern shows which kinds of lead your readers want more of.
Short on time this week? Paste your notes into the box at the top of this page, and River drafts the edition for you to finish, subject lines included. To grow the list, a lead magnet ebook gives people a reason to subscribe, and a welcome email sequence greets them before your next edition arrives.
How it works
Start with what you have for this week: bullet notes, a few links with a line on each, a voice memo transcript or a draft that stalled. River reads every link first, picks the strongest item to lead with and writes the edition in your workspace, with three subject lines and preview text on top. Paste a past edition and it follows your habits, from greeting to sign-off. Where a section needs a view your notes don't give, it leaves a marked gap instead of inventing one.
Paste your notes
Bullet notes, links, a voice memo transcript or a rough draft. Add a past edition if you have one.
River reads every link
It opens each page you linked, summarizes only what it says, and picks the strongest item to lead with.
Get the edition
Three subject lines with preview text, then the edition: opening, headed sections, your links and one call to action.
Finish and revise
Fill the marked gaps with your take, then ask for a shorter cut, another lead or social posts.
What you get
- Three subject lines from different angles, each paired with preview text that adds something new
- An opening that states your strongest item in the first two sentences, with no warm-up
- Section headings that promise something specific, so a reader who skims still gets the point
- Each link summarized from the page itself, and flagged plainly if River couldn't open it
- Your greeting, sign-off, sentence length and humor carried over from a past edition you paste
- One call to action taken from your notes, and marked gaps where only your own view will do
Common questions
What should a newsletter include?
A good edition has a subject line and preview text, an opening that gets straight to the main item, and short sections under headings that say what they hold. Put your own take beside each link, and close with one call to action and a sign-off. In the US, editions whose main purpose is promotion also need your postal address and a way to unsubscribe.
How do I write a newsletter with River?
Paste this week's notes, links or rough draft into the box at the top of this page. Add a past edition if you want your voice matched, and choose the kind of edition. River reads every link, picks a lead and writes the edition into your free River workspace, with three subject lines and preview text above it.
How long should a newsletter be?
Long enough to cover what you have this week, and no longer. There is no standard length. A roundup of a few links, with a line or two on each, can be complete in a few hundred words, while an essay edition may run past 1,000. River sizes each draft to your notes, usually 1,000 to 1,500 words for an essay or mixed edition and shorter for a roundup.
How often should you send a newsletter?
As often as you can send something worth reading, on a schedule readers can count on. Weekly suits a writer with a steady flow of ideas; monthly can suit a shop whose news comes in batches. Say on your signup form how often you'll write, then keep to it. A short edition on time beats a padded one or a skipped week.
Will it sound like me?
It follows your style if you paste a past edition. River notes that edition's concrete habits, such as your greeting, sign-off, sentence length, headings, humor and emoji use, and writes the same way. Without one, it writes in a plain, warm voice and says so at the top. Opinions stay yours: if your notes don't give one, the draft marks a gap for you to fill.
Does it make up facts about the links I include?
No. River opens every link you give it and summarizes only what the page says. If a page can't be read, for example behind a paywall or login, the draft says so next to that link and uses only your note about it. It never invents quotes, figures, customer stories or news.
Is the newsletter edition writer free?
Yes, it is free to start. Your edition opens in a River workspace, where you can edit it, copy it into your email platform or ask River to change it. Paid plans add more AI use and access to the most advanced models.
Sources
Nielsen Norman Group. “Marketing Email and Newsletters: UX Findings Then and Now.” nngroup.com (opens in a new tab)
Purdue University. “The Inverted Pyramid.” owl.purdue.edu (opens in a new tab)
Nielsen Norman Group. “Email Newsletters: Surviving Inbox Congestion.” nngroup.com (opens in a new tab)
Nielsen Norman Group. “Email Subject Lines: 5 Tips to Attract Readers.” nngroup.com (opens in a new tab)
Litmus. “The Ultimate Guide to Email Preview Text.” litmus.com (opens in a new tab)
FTC. “CAN-SPAM Act: A Compliance Guide for Business.” ftc.gov (opens in a new tab)
Apple Newsroom. “Apple advances its privacy leadership with iOS 15, iPadOS 15, macOS Monterey, and watchOS 8.” apple.com (opens in a new tab)
Built by
Chandler Supple
Co-founder & CEO, River
Chandler has spent the last six years working in AI, building tools for millions of users and Fortune 100 companies. In 2025, he co-founded River to build a new kind of operating system for AI agents.