Mailster WordPress Newsletter Plugin
Mailster WordPress Newsletter Plugin
Description
Mailster is an easy to use Email Newsletter Plugin for WordPress. Create, send and track your Newsletter Campaigns without hassle
Send Your Latest Posts, Products, Events or any other post type
Mailster lets you send all your posts, products, events or other custom post types. Every type can also be used for email automation.
Welcome Your New Subscribers
Set up your welcome series and leave the rest to Mailster.
You sit back and focus on your business while Mailster makes sure your new subscribers feel welcome.
Free and Premium Templates
Mailster offers you a choice of more than 400 free and premium designs.
Create stunning and engaging campaigns in minutes!
GDPR Compliance
When it comes to GDPR compliance, Mailster is your newsletter marketing tool of choice: Mailster fully complies with GDPR requirements.
All your data is stored in your own database and is not transferred or shared with third parties.
Grow Without Limits
With Mailster there’s no limit in subscribers. For a one-time fee you can have as many subscribers as you want.
Go ahead and grow as much as you like!
- Unlimited Subscribers
- Unlimited Forms
- Unlimited Lists
Send With Any Email Provider
Mailster works with any email provider, no matter if you want to use a professional provider or your own server.
RSS to Email
Your subscribers will want to know if there’s new content on a third-party site they follow.
With our RSS-to-email feature, new posts are automatically imported into an email and sent to your subscribers. Just set up your automation campaign and you’re ready to go.
Time Zone Based Sending
You have subscribers all over the world? With Mailster you send your email campaigns based on the time zone of your subscribers.
This way you ensure that your readers receive your emails at the exact times when they are most likely to open them.
Know Your Subscribers
Analyze your subscribers´ data and target your marketing strategy according to their needs.
Mailster collects and uses your subscribers’ data while staying completely within GDPR requirements.
Merge Tags
Merge tags are the key to marketing personalization: They are placeholder tags that get replaced with content tailored to your subscribers.
Our merge tags are customizable, extendable and easy to remember.
Create Better Segmentations
Increase your open rates with targeted campaigns and segmentation. Mailster provides many metrics to choose from so only the right audience gets the right email.
Great Campaign Insights
Track and analyse your campaigns and subscribers: Benefit from real time insights into your campaigns.
Find out about your subscribers’ click rates and open rates, their location, and other activities relevant for your online marketing strategy.
Test Your Email Quality Before Sending
With Mailster you can give your email campaign a thorough pre-check before sending it out.
Mailster gives you feedback on what you should improve.
Fix these issues, send and relax – your campaign will be good.
Automation
Send automatic welcome emails, birthday emails, drip campaigns, follow-ups, auto-responders and more.
Just sit back and let Mailster take care of your email marketing.
You Own Your Data
All your subscribers’ data is stored in your own database.
No third party has access to that data.
Dozens of Integrations With Plugins
We’ve partnered with many popular developers so you can continue using your favorite plugins along with Mailster.
Built in Capability Management
Assign specific rights to the people in your team. This makes it easy to keep full control over who does what.
Let your team support you!
Custom Template Language
With Mailster’s simple and straightforward template markup language, coding your own template or adopting existing ones is easy.
Developer Friendly
Mailster provides plenty hooks and filters you can use to increase its functionality and options.
Just go ahead and adapt Mailster to your unique needs.
Features
- Capture subscribers on your website or blog.
- Send your latest posts/products/custom post types.
- Welcome Emails.
- Birthday Campaigns.
- Follow up/Drip Campaigns.
- 400 free and premium templates.
- RSS email campaigns.
- Built in email campaign precheck.
- Integration with your favorite plugins.
- Import your existing data with ease.
- Available in over 15 languages.
- GDPR Compliance.
- Send with any email provider.
- Time zone based delivery.
- Merge Tags.
- Advanced Segmentation.
- Newsletter Campaign Insights.
- Auto Responders and email marketing automation.
- Full Data Control.
- Reports.
- Public archive of your latest newsletters.
- Capability management.
- Developer friendly.
Templates
Free and Premium Templates
Mailster supports over 400 templates from various authors. Please visit our website to browse them all.
Add Ons
Add Ons
Extend the functionality of Mailster or your site with these add ons.
Support
We’re Here to Help
Knowledge Base
Find help on our knowledge base. With over 300 articles, tips and troubleshoot guides you can quickly find answers to the most common problems.
Members Area
We provide all of our official support via the member area. Please login or register if you have not done so yet for access so that you can post your question there.
Installation
- Upload the entire
mailsterfolder to the/wp-content/plugins/directory - Activate the plugin through the ‘Plugins’ menu in WordPress
- Go to Tools => Mailster Tester and check for errors and warnings
Reviews
Awful performance and support
By ninjaneen on September 24, 2025
I don't often take the time to write a review but the "support" for this plugin is absolutely abysmal. The last FOUR WEEKS of trying to switch from legacy Mailster to new forms has been excruciating. It's been a complete waste of my time as a developer and a complete waste of my client's budget, having me liase all this time only to have to give up because 'support' won't help.
Firstly the 'legacy' forms were hacked and they were being used to send spam, so the hosting company took the website offline until the issue was sorted. I completely removed the legacy form, got the website back online, and then tried to switch to their new forms..... and then the fun really started!
Their documentation is awful. It's not even basic. So I kept having to reach out to ask one excruciating question after the next, one question a day, one answer a day. The days and weeks dragged by and we still can't create a 'Mailster Homepage' which is the new feature that replaced the 'legacy' feature.
This newsletter was used on a large health organisation website which is funded by the EU. Of course we're not going to grant 3rd party access to a live website so that can start testing. ONE MONTH LATER and the issues are still not resolved, because 'support' have said that they won't help. The reason? We don't have a license for the staging/development site which they can use to troubleshoot the issue.
We have now moved to a popular 3rd party solution because this last issue was really just the last straw. When the plugin was still working it would take an entire TWO DAYS just to send ONE newsletter to a small list of 2400 subscribers, even after using their 'intelligent email throttling" or whatever fancy name they give for a tool that makes no difference at all. We're not on cheap hosting either. We have dedicated CPU and processors.
Don't waste your time with this plugin.
Before you buy Mailster for WordPress
By Patryk (patryktarachon) on November 3, 2025
I've been using the plugin for 2 years, it works averagely. Since then they've only introduced up to 3 automations, which rarely work. It still doesn't load blocks and constantly displays error messages. The worst-optimized newsletter plugin.
Considering autoresponders, I've tried many times to figure out why some work (despite the same settings) while others don't send. I also don't understand why some subscribers receive Auto-responder messages while others don't, despite being added to the same lists. The time since they registered doesn't differ from the time those who receive these messages.
The plugin requires a lot of patience from developers, not to mention non-technical users.
Total nightmare
By emma336 on June 28, 2023
What a nightmare of a plugin.
There are virtually no instructions on how to set it up, it's unreliable and has lots of bugs. We had an issue with it trying to send hundreds of emails without knowing why it was doing it and there's no way of knowing how to solve the issues.
Thank you
By Musabah-hati (musabah) on June 19, 2021
Okay
By Tobias (tobiaseichner) on April 8, 2020
update?
By StevenW123 on January 6, 2018
Great Newsletter Plugin!
By josemanuel8 on May 23, 2024
Changelog
2.0.2
- removed Freemius SDK
2.0.1
- updated: readme
2.0.0
Completely rewritten from scratch
For further details please visit the changelog on the Mailster Homepage