Idea:
Give users an option to exclude messages that are already in the Trash folder when they search or filter their mailbox.

Why this matters:
I have about 30 000 messages, many of which I have already moved to Trash.
When I use the normal “search” or “filter by sender/recipient” function, the results still include those trashed messages.
Because the Trash folder keeps items for 30 days before permanent deletion, the unwanted messages stay visible and clutter the results.

What would help:
A simple checkbox or toggle such as “Hide messages in Trash” (or “Exclude trashed mail”) that can be turned on while searching or filtering.
When the option is active, only messages that are not in the Trash folder are shown, letting me review the remaining, relevant emails more quickly.

Benefit:
Faster, cleaner searches for everyone who regularly cleans up their inbox.
Reduces confusion caused by seeing both active and already‑trashed mail in the same result set.
Improves overall usability, especially for users with large mailboxes or limited English proficiency.