Mailster v.1.7.0 is the first release working with Joomla 4.

Features

• Joomla 4 compatibility (Joomla 3.x still supported)
• Business and Ultimate Edition: attachments are included in moderation requests (moderators can review attachments).
  Setting on by default, can be deactivated in global settings.

Improvements

• Turn off opportunistic STARTTLS for imap_open

Fixes

• Fix situations where the connection check button was not working
• Fix mailbox connection (pulling in secure authentication when not setup)
• Fix problem when inserting mail to DB
• Fix recipient hover display in mail archive's send reports
• Fix PHP warnings and noticese when already moderated (approved) message gets approved again