Current release v4.1.21Updated 21 Oct 2026

Mailster – Email Newsletter Plugin

Mailster is a powerful email newsletter plugin designed to streamline your email marketing efforts.

Membership Best value

This plugin and 16,000+ other products.

$6.58 a month

Every plugin, theme and kit, Mailster – Email Newsletter Plugin included
Auto Updater on 15 sites members only
50 downloads a day
Original licenses, 18 activations
Priority support with ticket tracking

or just this plugin

Mailster – Email… $3.49 once

Version v4.1.21Re-download anytime

USD INR

Version history

4 releases in 109 days, about one every 31 days

4.1.21 21 Oct 2026 Current
4.1.20 6 Oct 2026 Members
4.1.19 25 Sep 2026 Members
4.1.18 19 Jul 2026 Members

Owners of this product and members can download any of these builds. Sign in

The file

Published: 21 Oct 2026
Type: Plugin
Category: Email & Newsletters
License: GPL v2 or later

Overview

What you’re getting

Mailster is a powerful email newsletter plugin designed to streamline your email marketing efforts. With its intuitive interface, you can easily create and manage newsletters that engage your audience. Whether you’re a small business or a large enterprise, Mailster offers the tools you need to effectively communicate with your subscribers. Plus, its automation features ensure that your emails reach the right people at the right time. What makes it stand out is its versatility and user-friendly design, allowing you to focus on crafting messages rather than getting bogged down in technical details.

Key Features

Drag-and-drop email builder for easy customization
Automated campaigns to save you time and effort
Detailed analytics to track your email performance
Responsive templates that look great on any device
List segmentation to target specific audiences
Integration with popular WordPress plugins for enhanced functionality
Easy subscriber management to keep your lists organized
Customizable opt-in forms to grow your audience

Getting it

How to download Mailster for free

Buy this plugin on its own for $3.49, or take a membership from $14 and download it along with every other product on the site.

Either way you get the same file: the original .zip as the developer published it, with nothing removed and nothing added. Every upload is virus-scanned before it reaches your account, and earlier builds stay available if you ever need to match an existing site.

Updates come from us rather than from the developer: we publish each new release, usually within days. Members get them inside the WordPress dashboard through our Auto Updater plugin, and the setup guide walks through connecting a site.

Compare

This plugin alone, or everything

Just this plugin

This plugin only, yours to keep and re-download.

Mailster – Email Newsletter Plugin
Earlier versions of this plugin
One year of support
No Auto Updater
No original licenses

$3.49 once

Membership

Best value

This plugin and 16,000+ other plugins, themes and kits.

Every plugin, theme and kit
4 earlier versions of every item
Priority support with ticket tracking
Auto Updater on 15 sites
Original licenses, 18 activations

$6.58 a month, billed yearly

Activation

What works without a Mailster license key

Everything. The GPL license is already active in the code you receive, so every feature is present and working the moment you activate the plugin: nothing is stripped out, nothing is disabled, and your visitors see no difference from a site running the developer’s own copy.

The one thing a developer’s key normally carries is automatic updates from their servers. Members get those through our Auto Updater plugin, which delivers each new release into the WordPress dashboard. The setup guide takes about two minutes.

This product is fully unlocked: every premium feature is available with no key and no activation step of any kind.

The license

Is the Mailster free download legal?

Yes. This plugin is licensed under the GNU General Public License, the same license WordPress itself uses. The GPL expressly permits redistribution of the code, including redistribution for a fee, and the Free Software Foundation states plainly that the license sets no limit on what may be charged.

What we distribute is the original file, unmodified. The developer’s license verification code is left exactly where they put it; we simply do not supply a key, because a key is not ours to give.

What is not legal, and what we do not do, is distributing nulled software: files with the license check stripped out. That is modification of the code, and modified code is how WordPress sites get backdoored. We explain both at length: is GPL legal? and GPL versus nulled.

Installation

Up and running in minutes

1
Download the .zip
If it holds extras such as documentation, unzip it first and keep only the plugin file.
2
Upload it to WordPress
Go to Plugins Add New Upload Plugin, choose the file, then Install Now.
3
Activate
Click Activate.

Stuck on a step? We’re happy to help with installation.

Read the full install guide Open a support ticket

FAQ

Questions, answered

Can I get Mailster for free?

You can download it here for $3.49, or with a membership that includes every product on the site. It is not free of charge, but it is free of a recurring per-site license — the GPL allows redistribution, so you pay once rather than every year for every domain.

Is the Mailster free download legal?

Yes. It is licensed under the GNU General Public License, the same license WordPress itself uses, and the GPL expressly permits redistribution including for a fee. You receive the original unmodified file. What is not legal, and what we do not do, is distributing nulled software with the license check stripped out of the code.

Does Mailster need a license key?

No key is required to install and use the plugin, and your visitors see no difference. What a developer license adds is their own support channel, updates direct from their servers, and in some products a connection to their template or content library. Updates come from us instead. Members can also activate an original license on selected products.

Will I get Mailster updates?

Yes. When the developer releases a new version we publish it here, usually within days, and you download it from your account and install it over the previous one. Members also get it through our Auto Updater plugin, inside the WordPress dashboard. Earlier builds stay available in your account if you ever need to roll back.

How many websites can I use Mailster on?

As many as you like. The GPL places no limit on installations, so you can use this plugin on every site you build. Per-site limits come from a developer’s license terms, not from the code.

Is this the original Mailster file?

Yes. Downloaded from the developer and redistributed unmodified, with nothing added and nothing removed. Every file is virus-scanned before release. If you find a problem, use Report a problem on this page and we will fix it.

Still have a question?

Or open a support ticket and we’ll answer it.