Version 4.2 – Current Version 5/25/25

• Side-by-side layout for editing current restricted products.
• Admin UI now uses a flex layout to align email list and message fields.
• Visually cleaner and faster to manage multiple restrictions.
• Fully JavaScript-free and mobile-friendly within WordPress admin constraints.

Version 4.1

• Improved nonce verification and consistent sanitization of inputs.
• Partially prepped for WP_Filesystem usage (if needed later).

Version 4.0

• New admin tab layout: Manage and How to Use.
• Extensive plugin instructions and feature documentation included in admin UI.
• Improved messaging with recommended error message tips.

Version 3.4

• Added support for WooCommerce product variations.
• List of current restricted products displayed in admin UI.
• Inline editing of allowed emails and error messages.
• Cleaned up styling, layout, and feedback messages.

Version 3.0

• Added manual email entry option (textarea) alongside CSV upload.
• Ability to update and save email lists from within the admin interface.
• Basic error handling for file uploads and manual entry.

Version 2.0

• Plugin rebranded and retitled as Restrict Product Purchase by Email.
• Support for custom error messages per restricted product.
• Basic WooCommerce admin submenu integration.

Version 1.0 – Initial Concept

• Simple per-product email restriction using CSV files.
• Unauthorized customers blocked at checkout with a default error message.