RelatedMail for Mac

Quick summary of the add-on

RelatedMail is a compact plugin for Apple Mail that displays messages connected to the currently selected email. It groups related items by sender, subject, or date, making it easier to follow conversations and find context without manually searching through your mailbox.

Installing the extension

1. After finishing setup, open Apple Mail, choose the View menu, and enable "Show Related Messages."
2. Execute the required Terminal commands to register the plugin with the system.
3. Place the plugin folder into your user Library (~/Library) so Mail can access it.

What works well and what falls short

• Limited documentation and few in-app explanations mean you’ll often need to consult the developer’s website for details and troubleshooting.
• The plugin provides a quick way to surface messages connected by date, subject, or sender, which is helpful for reconstructing message threads.
• Installation is somewhat technical: beyond copying the files, you must run Terminal commands, which could be intimidating for less technical users.
• There’s no straightforward control for manually choosing how related messages are ordered; the indexing and display behavior can feel arbitrary at times.

Other options to consider

• Minecraft: Java & Bedrock Edition (paid) — listed as a top alternative in some sources.
• Mail-focused utilities such as MailTags or MailMate (paid) — these offer different approaches to organization and might suit users who want more predictable sorting and tagging.