How to recover deleted emails in Gmail on a computer or mobile device

You can recover deleted emails in Gmail for up to 30 days before they are permanently gone by sorting through the Trash ...
Techno-Science.net

How to Recover Missing Emails in Gmail

Search for the missing emails in the search box, check Spam and Trash folders, inspect filters and forwarding settings, and finally use the Gmail Message Recovery Tool to get the permanently deleted ...

How to delete all your emails on Gmail, or mass-delete a specific amount of emails at once

To mass-delete all your emails on Gmail, click the "Select" box, then "Select all conversations." Or you can choose specific ...
Ars Technica

Gmail and the "Deleted Items" label... How to get rid of it.

I've been struggling with this ever since Google cut off EAS support for normal users. I have two devices, my Windows Phone and Mail.app on Mac that access a Gmail account. Both devices are using ...