“When you delete an e-mail, it immediately gives you an option to undo that action. How humane! ” - except that option disappears after a while, so if I hit del

“When you delete an e-mail, it immediately gives you an option to undo that action. How humane! ” - except that option disappears after a while, so if I hit delete, switch windows and then think “oh shit I need that email back” then the undo option is gone and I’m screwed anyway. I’m also unsure about an article that claims “to one of the most basic and important mantras of interface design: Never use a warning when you mean undo.” When in the first examples it ignores one of the most basic and important mantras of interface design: use full sentences in your action buttons, not just “Okay”.