Google on Thursday is making a change to Gmail that will further bake in Google+ to its webmail product in a way that’s actually somewhat practical, though also potentially invasive. Going forward, you’ll now be able to directly email your Google+ contacts from Gmail, even if you don’t know their email address. And by default, anyone on Google+ will be able to email you as well, thanks to this new option, if you don’t adjust your settings. This feature appears as you begin typing your contact’s name in the “To” field of an email message. Matching contacts display first at the top of the list of suggestions provided by Gmail’s autocomplete, while your Google+ connections appear below. Because of the privacy implications of this feature — and the possibility of overwhelming the inboxes of more public figures — Google has at least put controls in place that allow you to specify who can send you emails.