Check the "Select all" checkbox at the top left of the email list.
Based on your request, managing, clearing, or listing 25,000+ unread emails typically requires bulk actions or automation, as standard manual deletion is inefficient. 25k mails access.txt
If the goal is to delete 25k emails to free up storage space: Check the "Select all" checkbox at the top
Here is a complete write-up on accessing and clearing a massive backlog of emails: 1. The Strategy: Bulk "Mark as Read" (25k+ Emails) or listing 25
Permanently delete them to regain storage, as they may stay in the trash for 30 days otherwise. 3. Alternative Approaches
In the search bar, type is:unread and press Enter.