Most email services and programs have a “drafts” folder into which they periodically save a copy of what you’re working on. Before noticing that everything’s selected, you type another character, which replaces the current selection.Accidentally typing CTRL+A for “select all” is the most common cause. Somehow everything in your message got selected.The scenario being “undone” is usually something like this: If it doesn’t, I type it more than once, just in case. Many times, whatever just disappeared returns just as quickly. That’s the keystroke sequence for the “undo” command. The very first thing I do in these situations 1 is type CTRL+Z. Most importantly, save your work often while composing your message so it’s been saved somewhere should something happen. Restart your email program or browser and check the drafts folder again.When email you’re working on suddenly disappears: