Mailster - Email Newsletter Plugin for WordPress
PluginCreate, send, and track email newsletters in WordPress. Self-hosted subscribers, campaigns, forms, and email marketing automation.
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Releases named in the vendor’s changelog or on WordPress.org that the repository does not have yet.
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4.1.21 Not available yet
fixed: retina loading spinner 404 when legacy form styles are printed inline
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4.1.20 Not available yet
fixed: pasting URLs into module text links in the campaign editor on Firefox
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4.1.19 Not available yet
fixed: date and anniversary workflow triggers now apply custom-field offset when matching subscribers
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4.1.18 Not available yet
fixed: template save and ZIP upload AJAX endpoints now block path traversal and unsafe file types
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4.1.17 Not available yet
This update brings stability and improvements for WordPress 7.0.
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4.1.16 Not available yet
removed: eliminate removetemplate method from MailsterAjax class to streamline AJAX functionality
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4.1.15 Not available yet
fixed: correct logic in URL validation check
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4.1.14 Not available yet
fixed: synchronize max days for warmup settings between queue and delivery files
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4.1.13 Not available yet
added: option to continue workflow on specific date delays if the date is in the past
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fixed: cast smtpsecure option to string for proper type handling
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4.1.11 Not available yet
added: implement installation checks and enhance default settings handling
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fixed: improve capabilities and permissions system
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4.1.9 Not available yet
fixed: missing capability to delete campaigns in some case
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4.1.8 Not available yet
fixed: bug when subscribe on multiple lists. 'wpdb->delete' may return 0 so do better checks
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4.1.7 Not available yet
fixed: issue where activating caused a fatal error if wpmail is used by another plugin
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4.1.6 Not available yet
fixed: campaigns cache were not cleared on status change
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4.1.5 Not available yet
improved: admin notices improvements
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fixed: profile showed unsubscribe button
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fixed: automation schedule generated invalid query if empty arguments were passed
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fixed: PHP warning in automations class
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4.1.1 Not available yet
fixed: PHP Error with PHP version 7.4
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4.1.0 Not available yet
new: Jumper Step: Jump to a specific step in the workflow.
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4.0.11 Not available yet
fixed: PHP error "attempt to assign a property to an array"
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4.0.10 Not available yet
fixed: escaping on web version
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fixed: line height on form selector input field
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4.0.8 Not available yet
fixed: linked images in templates weren't mapped correctly.
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4.0.7 Not available yet
fixed: action links on campaign overview page.
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4.0.6 Not available yet
fixed: Custom fields with underline were not working
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fixed: SQL error on form preview page
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fixed: journey were triggered more than once in some circumstances
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added: upgrade notice
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fixed: custom field creation during import if no custom fields are present
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4.0.1 Not available yet
fixed: some phpcbf issues
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4.0.0 Not available yet
Email Health Check: Check your delivery method to comply with upcoming changes to Gmail and Yahoo.
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3.3.13 Not available yet
new: Email Health Check: check your delivery method to comply with upcoming changes to Gmail and Yahoo
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3.3.12 Not available yet
fixed: deprecated notice on subscribers detail page for php 8.2+
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3.3.11 Not available yet
fixed: deprecated method
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3.3.10 Not available yet
fixed: warning on PHP 8.2 if subscriber count is 0
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PHP 8.2 compatibility 🎉
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3.3.8 Not available yet
improved: honeypot mechanism to prevent false positives on heavy cached sites.
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3.3.7 Not available yet
fixed: missing action on migration process
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3.3.6 Not available yet
fixed: lists are not confirmed if user choice is enabled.
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3.3.5 Not available yet
updated: Freemius SDK to 2.5.9
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3.3.4 Not available yet
fixed: MySQL error on Autoresponder which uses "has received but not opened" or "has received and not clicked" condition.
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3.3.3 Not available yet
added: 'mailsteradminheader' hook
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3.3.2 Not available yet
fixed: Division by zero on campaign edit screen
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3.3.1 Not available yet
updated: Freemius SDK to 2.5.5
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3.3.0 Not available yet
new: [Action Required] license provider - please follow the guide to migrate your license
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3.2.6 Not available yet
added: option to bulk add and remove from every list
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3.2.5 Not available yet
new: Admin header bar with new support integration.
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3.2.4 Not available yet
Do not show form occurrences from auto draft posts
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3.2.3 Not available yet
fixed: EERROR on Geo location class in PHP 8.1
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3.2.2 Not available yet
added: native Advanced Custom Fields support.
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3.2.1 Not available yet
fixed: issue where taxonomies in campaigns are not stored correctly.
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3.2.0 Not available yet
fixed: querying subscribers do no longer return subscribers with status deleted.
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3.1.6 Not available yet
added: option to change tracking of campaigns once the campaign has been finished
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3.1.5 Not available yet
new: growth rates on campaign overview
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3.1.4.1 Not available yet
fixed: issue with WooCommerce 6.5.1 and third party library
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new: forms on frontend no longer requires jQuery
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fixed: default placeholder tags where not replaced on system mails
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3.1.2 Not available yet
fixed: CSS for WP 5.9
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3.1.1 Not available yet
fixed: time specific auto responders sent only on Sundays causes sending the following to be way in the future
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3.1 Not available yet
new: Remove inactive Subscribers automatically
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3.0.4 Not available yet
fixed: saving template from editor messed up template header
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3.0.3 Not available yet
fixed: timeframe settings spanning over midnight
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3.0.2 Not available yet
fixed: bulk options causes a subscriber query error.
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3.0.1 Not available yet
added: editing templates on the templates page is back
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3.0 Not available yet
new: Test the Email Quality with the built in Pre-check Feature.
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2.4.19 Not available yet
fixed: Option bar is fixed after a certain scroll threshold again.
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2.4.18 Not available yet
fixed: comparing empty date values on MySQL 8
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2.4.17 Not available yet
fixed: issue with subscriber button on some versions of Firefox
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2.4.16 Not available yet
fixed: warning on dashboard
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2.4.15 Not available yet
added: option to remove subscribers with all assigned actions.
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2.4.14 Not available yet
improved: internal handling for sending limits
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2.4.13 Not available yet
added: classes to settings rows
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2.4.12 Not available yet
added: mailsterinlinecss filter hook to disable auto inline css
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2.4.11 Not available yet
change: changing the email address on the profile sets status to pending and sends confirmation message if double opt in is enabled.
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2.4.10 Not available yet
new: option to pick emoji for subject, preheader and from name
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2.4.9 Not available yet
change: moved text strings for GDPR to text tab for better localization.
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2.4.8 Not available yet
fixed: escaped content on edit screen.
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2.4.7 Not available yet
improved: CSS for WordPress 5.3
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2.4.6 Not available yet
tested with WordPress 5.3
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2.4.5 Not available yet
fixed: issue saving "send campaign only once" option
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2.4.4 Not available yet
improved: you can now encode tags output with an exclamation mark {!mytag}.
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2.4.3 Not available yet
fixed: postcategory tag now shows categories names again
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2.4.2 Not available yet
change: dummy image service domain
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2.4.1 Not available yet
fixed: duplication of forms working again
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2.4 Not available yet
new: Use over 900K photos from Unsplash
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2.3.19 Not available yet Release date not stated
fixed: custom 'mailsterautopost' output is working again.
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2.3.18 Not available yet
updated: included template
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2.3.17 Not available yet
added: mailsteraddembededstyle method to add custom embeded styles.
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2.3.16 Not available yet
new: option to choose original image in editbar (for animated gifs)
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2.3.15 Not available yet
fully tested on WordPress 5.0
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2.3.14 Not available yet
fixed: missing fallback on custom fields
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2.3.13 Not available yet
fixed: Max execution time error message pops up randomly on some servers.
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2.3.12 Not available yet
fixed: height attribute of image tags were not always respected.
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2.3.11 Not available yet
fixed: added “source” tag in allowed tags
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2.3.10 Not available yet
new: you can now use [newsletterprofile] and [newsletterunsubscribe] everywhere where short codes are accepted
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2.3.9 Not available yet
fixed: manage subscribers with no list assigned included users within a list
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2.3.8 Not available yet
fixed: caching issue on tags in subject line
Readme
LicenseMailster - Email Newsletter Plugin for WordPress
Create, send, and track email newsletters in WordPress. Self-hosted subscribers, campaigns, forms, and email marketing automation.
Mailster is a WordPress email newsletter plugin for creating, sending, and tracking campaigns from your own site. Subscribers, lists, forms, and campaign data stay in your WordPress database—without per-subscriber SaaS limits.
Use it for email marketing on blogs, publishers, stores, and membership sites: grow your list with signup forms and popups, send campaigns and automated emails, segment your audience, and review opens, clicks, and other insights.
Create and Send Campaigns
Build campaigns with Mailster’s editor and choose from more than 400 free and premium email templates. Personalize messages with merge tags, schedule delivery, and send posts, products, events, or other custom post types by email.
Signup Forms and Popups
Capture subscribers with block-based forms and popups you edit in the WordPress block editor. Place forms on pages, in templates, or via shortcode and block markup. Single opt-in and double opt-in are supported so you can match your list-building workflow.
Email Marketing Automation and Workflows
Automate follow-ups with workflows and auto-responders: welcome series, birthday emails, drip campaigns, trigger-based journeys, and more. Keep subscribers engaged without sending every message by hand.
RSS to Email
Turn new posts from your site or a third-party feed into email with RSS-to-email automation. Set up the campaign once and Mailster can import fresh content and send it to your list.
Segmentation, Personalization, and Insights
Segment subscribers with conditions based on lists, tags, activity, and other metrics so the right audience gets the right email. Track opens, clicks, location, and related campaign activity to refine your strategy.
Time Zone Based Delivery
Send campaigns according to each subscriber’s time zone so messages arrive when readers are more likely to open them.
Campaign Precheck and Delivery Options
Run a campaign precheck before you send to catch common quality issues. Deliver through Simple or SMTP built in, or use delivery add-ons for professional email providers. One-click unsubscribe (RFC 8058) is supported for modern inbox requirements.
Privacy and Data Ownership
Subscriber data is stored in your own WordPress database. Mailster includes tools that help with privacy workflows, including double opt-in, unsubscribe handling, and WordPress personal data export/erase integration. You remain responsible for how your organization meets applicable laws such as the GDPR.
Unlimited Subscribers, Forms, and Lists
Grow without per-subscriber pricing caps:
- Unlimited subscribers
- Unlimited forms
- Unlimited lists
Delivery volume still depends on your hosting and email provider.
Integrations, Templates, and Team Controls
Extend Mailster with add-ons for providers and plugins, embed forms in builders such as Elementor and Divi, and assign capabilities so teammates only get the access they need. Developers can customize behavior with hooks, filters, and Mailster’s email template markup language.
Features
- Email campaigns with tracking and reports
- Self-hosted subscribers, lists, and tags in your database
- Block forms and popups for list signup
- Welcome, birthday, drip, follow-up, and workflow automation
- Send latest posts, products, events, and other post types
- RSS-to-email campaigns
- Merge tags and advanced segmentation
- Time zone based delivery
- Campaign precheck before sending
- SMTP and email provider delivery options
- One-click unsubscribe (RFC 8058)
- Public archive of sent campaigns
- Import and export subscriber data
- Capability management for teams
- Hooks, filters, and custom email templates
- Available in multiple languages
What it adds
- 23 block(s): Action, Comment, Condition not fulfilled, Condition fulfilled, Condition, Delay, Email, Jumper, Notification, Stop, Trigger, Triggers, Close Link, Mailster Form, Mailster Form
- Shortcodes:
[mailster_form] [newsletter] [newsletter_block_form] [newsletter_button] [newsletter_confirm] [newsletter_list] [newsletter_profile] [newsletter_signup] [newsletter_signup_form] [newsletter_subscribers] [newsletter_unsubscribe] - Content types:
mailster-form, mailster-workflow, newsletter
Installation
- Purchase and download the Mailster ZIP from mailster.co.
- In WordPress, go to Plugins → Add New → Upload Plugin, select the ZIP, then install and activate Mailster.
- Complete the Setup Wizard on a fresh install to configure basic settings.
- Open Newsletter → Settings → Delivery and choose a delivery method. For larger lists, use SMTP or a dedicated email provider add-on rather than the Simple method.
- Create a signup form, import subscribers if needed, then build and send your first campaign.
- Optionally run Self Tests from the Mailster plugin row on the Plugins screen (or Newsletter → Self Tests when debugging) to check your environment.
For step-by-step guides, see the Mailster Knowledge Base.
Faq
Is Mailster a hosted email marketing subscription service?
No. Mailster is a premium WordPress plugin. Your subscriber list and campaign data live on your site. You choose how mail is sent (Simple, SMTP, or a provider add-on). Feature use is not billed per subscriber; an active license is required for updates and support.
Do I need a third-party email provider?
You can send with the built-in Simple or SMTP methods. For better deliverability and higher volume, a dedicated email service provider is recommended. Mailster add-ons connect many popular providers.
Is there a free version?
No. Mailster is premium only. You can try the demo on mailster.co and a money-back guarantee is offered on purchase (see the pricing page for current terms).
Can I use my own server to send emails?
Yes. SMTP and host-based sending are supported. Confirm that your host allows bulk mail and that the required SMTP ports are open.
Does Mailster store my subscribers in the cloud?
No. Subscribers are stored in your WordPress database. If you send through an external email provider, that provider receives the message data needed for delivery—review their privacy terms separately.
Does Mailster help with GDPR?
Mailster provides privacy-oriented tools such as double opt-in, unsubscribe links (including one-click unsubscribe), and WordPress personal data export/erase support. Mailster cannot give legal advice; you remain responsible for your organization’s compliance.
Can I code my own email templates?
Yes. Mailster uses a straightforward email template markup language so you can adapt existing HTML email templates or build your own.
Will Mailster work with my theme?
Mailster is designed to work with properly coded WordPress themes. Block forms also integrate with page builders such as Elementor and Divi. If something conflicts, contact support with details.
Where can I get help?
Use the Knowledge Base for guides and troubleshooting, or the members area for official support.
Install
composer require meteorgpl-plugin/mailsterThe vendor’s license checks are intact: activate the plugin in WordPress with a license key bought from the vendor.
License
The plugin declares no license. The code is redistributed under the license the vendor declared in the plugin’s own headers.
Artwork, fonts, media and documents that may be licensed separately are not redistributed; the licensing page explains what is replaced or removed, and the security tab lists it per version. Support and update entitlement come with the license you buy from the vendor.