Answer
Choose multiple conversations by clicking the Select: All link above your messages. Above your messages, click the Select all [numbers] conversations link. Click the link that says Choose all [numbers] contacts in [current view].
How To Delete Old Emails In Gmail In Bulk – Delete Multiple Emails At Once
Delete All Mail in Gmail AT ONCE…THE EASY WAY
1. Instead of clicking a nifty button
2. You’ll have to press and hold the Shift key.
3. Click the first email, keep holding down Shift
4. Click the last email, and then hit Delete.
To select a larger file, go to the Gmail search bar and press on the down arrow. For example, choose 20MB as the size, then pick a month for the time window. All 25MB files will appear. You may back up your essential data and then delete it if you want to remove everything or only certain items.
Delete All Messages from Deleted Items. To get started, log into your Gmail inbox as you normally would. Select all displayed messages by checking a little box beneath the search bar. Select all Conversations. Delete all Messages. Empty Trash is where you can empty your trash cans (if applicable).
If you enter older_than:1y, you’ll get a list of all Gmail emails older than one year. For months or days, type m or d. Select all conversations that match this search followed on by the Delete button if you want to delete them all.
to select everything on the current page, click the checkbox (to the left of the Refresh button) to select everything. To select everything in a certain label, use one of these methods: link appears to “select all …conversations in” and you can continue to Select Conversations from Other Labels. Delete button Once you’ve deleted
Go to Gmail on your computer. Select all emails in the top left corner. If you have more than one page of messages, choose them all by clicking Select all conversations at the top. Delete is the first step; click it to continue.