Mailster – The mailing list solution for Joomla

Turn your Joomla! site into a fully‑featured mailing list server.
With Mailster, your community can converse simply by sending email — no log‑ins, forums, or social feeds required.

Why Mailster?

  • True peer‑to‑peer email – Every message sent to your list address is instantly forwarded to all subscribers.
  • Use any mailbox – Point Mailster to a POP3 or IMAP inbox on your own server or a free email provider. No special hosting needed.
  • Seamless Joomla! integration – Manage lists and members right inside the backend; import existing Joomla! user accounts with a click.
  • Self‑service sign‑up forms – Place opt‑in widgets on the frontend so visitors can join or leave lists whenever they like.
  • Automatic archiving & search – Every post is stored in your Joomla! database for future reference and full‑text search.
  • Set‑and‑forget administration – Subscribers always reach the whole group via one address; no one has to manage local address books.

How it works

  1. Choose a mailbox – Create or re‑use any email address accessible via POP3 or IMAP.
  2. Configure Mailster – Tell Mailster the mailbox credentials and who belongs to the list.
  3. Let it run – Mailster checks the mailbox on a schedule, redistributes new messages to all members, and archives them.

Perfect for clubs, project teams, nonprofits, or anyone who prefers the simplicity and reliability of email.

Stop copy‑pasting address lists. Start real conversations with Mailster.

Customer Reviews

From the Joomla! Extensions Directory

Powerful extension with excellent support
I needed a mailing system for my joomla page, compared some extension and decided on Mailster.
Never regretted it!

Started using the basic version last year but then switched to the professional version some time ago. […]

Wana

[…] I was able to greatly simplify the management of these lists as they are now all administered from within the Joomla backend.
I’ve had a couple of small problems which have been sorted extremely quickly by the developer.

[…] This is a great extension, which I highly recommend.

Bob Williams

I have been using this software for many months.
This is absolutely the best email discussion group component for Joomla!.
Its easy to use, easy to setup, a huge amount of optional features and tweakability, and best of all…RELIABLE.
I don’t know what I would do without it.

Norske

Latest Updates

  • 1.8.2 Bugfix Release (January 2nd, 2025)
    Mailster v1.8.2 runs on Joomla 3, 4 and 5. Here is the overview of the changes in this release: Fixes Opening the user edit view also works when there are mailing lists with names that contain the & symbol Do not save attachment(s) when the email fails to be saved
  • 1.8.1 Bugfix Release (September 17th, 2024)
    Mailster v1.8.1 runs on Joomla 3, 4 and 5. Here is the overview of the changes in this release: Improvements Improve styling in Joomla 5 Shorten (too) long subjects to the current max. length: 191 characters Issue warning when Mailster system plugin (Email Forwarder) has access level not set to Public Improve cronjob execution to bail if not all prerequisites are given Add selected logging about queue status and actions Fixes Servers can be published/unpublished/deleted again Make the Mailster system plugin more resilient Remove unneeded Joomla 2.5 style params in config XMLs Remove connection check Change toward general Exception-catching
  • 1.8.0 Major Release (April 4th, 2024)
    Mailster v1.8.0 is the first release compatible with Joomla 5.Joomla 3 and 4 are still supported, though. Features Joomla 5 compatibility (Joomla 3 and Joomla 4 still supported)   Improvements CSV import also supports file with only emails (no name column) Improve logging for sending (and errors reported) Do not create Microsoft and Google default connections because of missing OAUTH2 support Better checks in cronjob_mailster.php template Fixes Fix reCaptcha (v2 is still used) Fix email character display/modification issues with Baltic encoding Bounce emails containing email addresses in angle brackets are showing the addresses Admin email archive toolbar buttons are enabled/disabled… Read more: 1.8.0 Major Release (April 4th, 2024)