June 19, 2012, 3:37 PM — Here's how you let friends email you from your Google+ profile.
1. Go to your Google+ profile.
2. Select Edit Profile.
3. Find the Send an Email link below your profile photo.
4. If it's greyed out, click it and then check the "Allow people to email me from a link on my profile" option.
For more, see the original article at the link below.
7 Google+ essentials | CNet