Microsoft Outlook does not properly handle redefined "Paste" keyboard shortcut
Here's what worked for me:

Create DefaultKeyBinding.dict under ~/Library/KeyBindings (Create KeyBindings folder if it doesn't exists)  Then paste the contents below into that file:

  &lt;?xml version="1.0" encoding="UTF-8"?&gt;
  &lt;!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd"&gt;
  &lt;plist version="1.0"&gt;
  &lt;dict&gt;
          &lt;key&gt;^v&lt;/key&gt;
          &lt;string&gt;noop:&lt;/string&gt;
  &lt;/dict&gt;
  &lt;/plist&gt;


Alternately, you can use the following, non-XML syntax (this is the entire contents of the file, and any other keybindings would go inside the curly braces):

{
    "^v" = noop:;
}


Restart Outlook, and all other affected programs, and ctrl + v should no longer scroll down.