Turn the newsletters you already receive into a calm, organized reading library on your Mac.
A dedicated Mac app for the things you actually meant to read.
Trim trackers, ads, embeds, and clutter before they reach your eyes.
Save the good bits in familiar colors, right where you found them.
Letterboxxes work like folders, keeping subscriptions stored, sorted, and out of your inbox.
Reveal sender, source, composition, and Clean View details without leaving the reader.
Simple Auto-Delivery rules send recurring newsletters where they belong.
Adjust type, density, badges, dates, and status icons until it feels right.
Encrypted backups protect newsletters, Letterboxxes, rules, highlights, and settings.
Light, dark, e-ink, newspaper, Kitty Cat, and more. Because this is a Mac app.
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.
How it works
Pick the mail folders that contain the things you want to read. Letterboxx imports copies into your local reading library, while your original messages stay in your email account.
What changes
Instead of treating every newsletter like another inbox item, Letterboxx turns recurring subscriptions into collections you can read, highlight, search, and keep.
Start with 14 days free before deciding.
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.
Build collections, route new issues, highlight the good parts, search saved reading, clean messy newsletters, and back up your local library.
Newsletter Workspace
Choose the mail folders that contain newsletters. Letterboxx imports local copies, keeps the originals in your email account, and turns those newsletters into a searchable, highlightable reading library.
Calmer Reading
Newsletters are essays, analysis, updates, digests, product notes, research, local coverage, and niche publications worth coming back to.
Clean View
Clean View trims trackers, ads, embeds, and messy email HTML so long-form newsletters feel calmer, faster, and easier to finish.
Custom Letterboxxes
Create Letterboxxes for topics like investing, design, local news, research, work, or weekend reading, then keep each one separate from everyday mail.
Auto-Delivery
Auto-Delivery rules send new issues to the right Letterboxx as they arrive, so your reading library stays organized without another cleanup habit.
Highlights + Recall
Highlight useful passages in familiar colors and return to saved ideas later, even after the newsletter has moved out of view.
Message Diagnostics
Inspect sender identity, source details, composition data, and Clean View changes when a newsletter looks strange or deserves a closer look.
Backup
Encrypted backups help preserve newsletters, Letterboxxes, rules, highlights, and settings so your reading history is not fragile.
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.
What you get
For about the price of one newsletter subscription, Letterboxx keeps the ones you already care about organized, readable, and under your control.
Download Letterboxx from the App Store. Start with 14 days free before deciding.
Flexible 📆
$4.99/month
$59.88/year if paid monthly.
Best if you want the full Letterboxx experience without choosing a yearly plan yet.
Best value 💵
$39.99/year
About $3.33/month.
Best if newsletters are already part of your week and you want the lowest long-term price.
