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Welcome to Mailnib
Mailnib is a self-hosted email design platform you can sell to your own customers. You install it once; your customers sign up, design emails in a drag-and-drop editor, and export them to whatever service they send from.
What you get
- An email editor with twenty-five blocks, ten ready-made layouts, 79 original templates and a blank start, brand kits, merge tags and live email checks. It works with a mouse, with the keyboard alone, and on a phone.
- Multi-tenant accounts. Each customer gets their own workspace with a team, roles, and plan limits. One workspace can never see another's designs.
- An operator console for you: tenants, plans, subscriptions, invoices, branding and email settings.
- Six export formats: inlined HTML, HTML with a style block, a ZIP with images, JSON, EML and plain text.
- White-labelling. Your name, logo and accent colour replace ours everywhere your customers look.
What it deliberately is not
Mailnib builds emails. It does not send campaigns. There are no contact lists, no subscriber imports, no scheduled campaigns, no open or click tracking, and no deliverability tooling. Your customers export their design and paste it into the sending service they already use.
The only mail the platform sends itself is:
- account mail (email confirmation, password resets), and
- test sends of a design, to addresses whose owners have confirmed them.
This is a product decision, not a missing feature. Leaving sending out is what lets the product run as one Node.js process with one database, on ordinary hosting, with no queue and no background worker.
Requirements
| You need | Minimum | Notes |
|---|---|---|
| Node.js | 20 or newer | Node 22 is recommended. |
| PostgreSQL | 14 or newer | Version 16 is recommended. |
| Disk | 2 GB | Plus room for your customers' uploaded images, unless you use S3 storage. |
| Memory | 1 GB | 2 GB is comfortable. |
That is all. There is no Redis, no queue, no worker process and no headless browser.
A host with no Node.js support at all (a PHP-only plan) cannot run Mailnib.
Your licence
Mailnib is licensed through the marketplace you bought it from, and that marketplace's licence is what allows you to use it. The LICENSE file in your download names the licence that applies, links to its full terms, and explains what it means for a platform whose tenants pay. Read it before you launch.
What is in your download
| Folder or file | What it is |
|---|---|
documentation/ | These pages. |
runtime/ | The prebuilt application, ready to run. This is what the VPS and cPanel guides install. |
source/ | The complete, readable source code, the lockfile and the template sources. The Render, Vercel and "your computer" guides build from it. |
install.sh | The one-command installer for a fresh server. |
README.md, LICENSE, CHANGELOG.md, CREDITS.md, THIRD_PARTY_NOTICES.txt | Quickstart, licence notice, version history, and the credits and licence texts for everything bundled. |
The code in runtime/ is a minified production build. The readable code it was built from is in source/.
Choose how to install
| Your hosting | Go to |
|---|---|
| A fresh Ubuntu or Debian server (recommended) | Install on a VPS |
| cPanel with Setup Node.js App | Install on cPanel |
| Render | Install on Render |
| Vercel | Install on Vercel |
| Your own computer, to try it out | Install on your computer |
Each guide ends with a check you can see, and then hands you to the web installer, which creates your operator account.
How these pages work
These pages are plain HTML in the documentation/ folder of your download. They open straight from your disk, with no server and no internet connection. Use the search box at the top of the sidebar, or press / to jump to it. The button in the top-right corner switches between light and dark.