My email in-box is now swamped by every vendor to whom I have given my address. How can I block unwanted senders?
First, if they are legitimate businesses you have used, they usually have an "unsubscribe" link in their emails, typically at the bottom someplace. Try that first. If it doesn't work, then you can set up a filter for them. On the Inbox page click on the gear icon in the upper right corner of the page, then on Settings. Under Mail in the left pane, you will see "Filter rules". Click on that and follow the prompts.