You can obtain an email preview link from the message editor under the Configure tab or from the list of messages page. These links can be shared because they don't contain contact specific details.
View online link
Use the "View online" selection under the "Sharing" dropdown to insert a link to the online version of your email. This link excludes contact specific details so that your recipients can view and share emails easily.
Social media sharing
You can add a link to your social media sites or links to share your content on social media from the "Sharing" dropdown in the editor:
The social media icons will automatically link to the social media profiles that are set up on the account settings page.