What?! I do this?
Go to 'goo.gl/maps/xfWTQ' and you will be in streetview?
Now if you select some words in a GMail and make them a link, with that URL, then clicking those words will take you to street view.
OH! Silly me. You want to go right to a street address (in streetview) in mail sent to you right?
Sorry! I wasn't reading clearly. If people sending the mail did what I do, then you could click the addresses.