I want to delete a date range of emails (from jan 2011-sept 2011). I do NOT want to delete all my emails, and I would rather not have to do it page by page. (100 conversations at a time) Is this possible?
Done! If you want them "gone" gone at this point, empty your "Trash".
Do note that this selects conversations, not individual messages. If a conversation spans your start or end date you might catch things you didn't intend. (Obviously of no concern if you have turned off conversation view.)
Type "older_than:Xy" into search (X being the value in years that you want to highlight and eventually delete. You can also do months or days by using m or d instead of y)
Press select all button in the upper left hand of the inbox
When all of the entries on that page are highlighted, a line that says "All 50 conversations on this page are selected. Select all conversations that match this search"