Connect your email. Read local copies.
Pick the mail folders that contain the things you want to read. Letterboxx downloads local copies into your Mac reading library, while original messages remain on the mail server unless you delete them.
Newsletters deserve their own app.
Read and organize email newsletters in a dedicated Mac app — not inside your everyday inbox.
Read without living in your inbox.
A calmer reading space for the newsletters you want — not your everyday email.
Turn newsletter clutter into a library.
Create Letterboxxes for topics, writers, projects, or anything you want to keep together.
Let recurring newsletters sort themselves.
Route each sender, subject, or newsletter type to the right Letterboxx automatically.
Remove the clutter. Keep the writing.
Clean View trims trackers, ads, embeds, and messy email HTML for a calmer read.
Highlight what you want to remember.
Save useful passages in familiar colors and find them again later.
Come back to what matters.
Favorite a newsletter, set a reminder, or move it somewhere you’ll find it next.
Protect the library you’re building.
Encrypted backups preserve newsletters, Letterboxxes, rules, highlights, and settings.
See your reading life at a glance.
Track what arrived, what you’ve read, and the library you’re building.
A reader that belongs on your Mac.
Choose light, dark, e-ink, newspaper, and other themes designed for comfortable reading.
Email is for communication.
Letterboxx is for reading.
Your email inbox is built for messages, replies, and triage. Letterboxx is built for essays, digests, roundups, research, and the publications you actually meant to revisit.
Your newsletters do not change.
The way you use them does.
Instead of treating every newsletter like another inbox item, Letterboxx turns recurring subscriptions into collections you can read, highlight, search, and keep.
Your inbox is good at:
- Sending and receiving messages
- Replying and forwarding
- Processing the inbox
- Getting back to zero
Letterboxx helps you:
- Build collections around topics
- Route newsletters automatically
- Highlight useful ideas
- Search across years of saved issues
- Read without inbox chaos
Download Letterboxx for Mac.
Start with 14 days free before deciding.
Take a tour of your newsletter library.
Click through Dashboard, Newsletter, Clean View, Message Diagnostics, Backup & Restore, and Highlights to see how Letterboxx turns email newsletters into a calmer Mac reading space.
For a deeper look, explore the email newsletter app, the newsletter app for Mac, the Gmail newsletter reader, how to organize email newsletters, or the letters behind Letterboxx.
See what Letterboxx can do for you.
Build collections, route new issues, highlight the good parts, search saved reading, clean messy newsletters, and back up your local library.
A Mac reading library built from newsletter copies.
Choose the mail folders that contain newsletters. Letterboxx downloads local copies to your Mac, leaves originals on the mail server unless you delete them, and turns those newsletters into a searchable, highlightable reading library.
A dedicated place for what you meant to read.
Newsletters are essays, analysis, updates, digests, product notes, research, local coverage, and niche publications worth coming back to.
Cleaner reading, before the newsletter reaches your eyes.
Clean View trims trackers, ads, embeds, and messy email HTML so long-form newsletters feel calmer, faster, and easier to finish.
Give every newsletter a place to land.
Create Letterboxxes for topics like investing, design, local news, research, work, or weekend reading, then keep each one separate from everyday mail.
Let recurring newsletters sort themselves.
Auto-Delivery rules send new issues to the right Letterboxx as they arrive, so your reading library stays organized without another cleanup habit.
Save the parts worth remembering.
Highlight useful passages in familiar colors and return to saved ideas later, even after the newsletter has moved out of view.
Understand what each newsletter contains.
Inspect sender identity, source details, composition data, and Clean View changes when a newsletter looks strange or deserves a closer look.
Protect the library you are building.
Encrypted backups help preserve newsletters, Letterboxxes, rules, highlights, and settings so your reading history is not fragile.
Jason Snell’s Pick of the Week!
Jason Snell picked Letterboxx as his Pick of the Week on the August 11, 2026 episode of MacBreak Weekly.
Watch Jason Snell talk about Letterboxx on MacBreak Weekly.
MacBreak Weekly © TWiT, LLC. Used with permission. TWiT.tv
Reading beyond the inbox.
Letterboxx was built because newsletters deserve better than being treated like just another email. Read the ideas, stories, and philosophy behind the app.
The inbox is where newsletters arrive.
It shouldn’t be where they live.
The Writers In My Inbox
On newsletters, writers, and the things worth keeping
A personal letter about newsletters, writers, digital archives, and why Letterboxx became a dedicated home for the messages worth keeping.
Why Newsletters Feel Different From Email
On writers, recurring attention, and the strange little publications hiding in the inbox
A letter about why newsletters arrive through email but feel more like reading, publishing, and relationship than ordinary inbox communication.
I Don’t Want Inbox Zero. I Want a Reading Shelf.
On newsletters, attention, and the difference between clearing and keeping
A letter about why newsletters should not be treated like inbox chores, and why Letterboxx gives saved reading its own shelf.
Notes from the Letterboxx workbench.
Small product notes, reading ideas, and the occasional look at what’s taking shape in Letterboxx.
Follow @letterboxx on MastodonOnly original posts from Letterboxx appear here.
Out of the inbox.
Into your own personal library.
Connect the email accounts you already use, or use a dedicated newsletter address. Letterboxx gives your favorite reads their own calm, organized home on your Mac.
Everything your newsletters need.
For about the price of one newsletter subscription, Letterboxx keeps the ones you already care about organized, readable, and under your control.
- One focused Mac workspace for newsletters instead of inbox triage.
- Custom Letterboxxes and smart filters for the way you actually read.
- Clean View, Message Diagnostics, and privacy tools for messy email HTML.
- Highlights, reminders, and reading history so good ideas are easy to find again.
- Local-first storage with encrypted backup and restore tools.
Download Letterboxx for Mac.
Download Letterboxx from the App Store. Start with 14 days free before deciding.
Monthly
$4.99/month
$59.88/year if paid monthly.
- Trial14 days free
- AccessFull app
- CommitmentMonth to month
- Best forTrying it out
Best if you want the full Letterboxx experience without choosing a yearly plan yet.
Annual
$39.99/year
About $3.33/month.
- Trial14 days free
- AccessFull app
- SavingsSave 33%
- Best forRegular readers
Best if newsletters are already part of your week and you want the lowest long-term price.
A Mac app built for reading email newsletters.
Letterboxx: Newsletter Reader is a Mac app for reading and organizing email newsletters. It adds search, highlights, and a local reading library to the newsletters you already receive.
- Available now
- Letterboxx is available now on the Mac App Store and is no longer distributed as a public TestFlight beta. View it on the Mac App Store.
- Built for newsletters
- Collect, organize, search, highlight, and revisit the newsletters you already receive.
- Connects to your email
- Letterboxx securely connects to Gmail, iCloud, Outlook, DreamHost, and other IMAP email accounts.
- Local reading library
- Letterboxx downloads local copies of your newsletters so they’re organized, searchable, and ready to read on your Mac.
Letterboxx connects directly to email accounts using IMAP and stores local copies of newsletters on your Mac. Original messages remain on the mail server unless deleted by the user.
