All I need is a way to add extra tags to emails for organizing them in smart mailboxes. I want to tag each project with its name to track involved companies easily. Thunderbird has good tagging, but its UI and smart mailbox system aren’t as smooth as Mail.

Mailbutler’s tags didn’t work as I hoped—I need emails in a folder, not just in the sidebar. Clicking to find tagged emails in the inbox felt confusing.

For now, I’ve reorganized Mail’s built-in tags and will work within its seven-tag limit. I’ll keep an eye on Mailbutler for future updates.