Add following in the ext.properties file.
Make sure to correctly configure mail set up
1. Control Panel --> Server Admin --> Mail
2. User configures Mail Server
3. Portal Instances --> Update Mail Domain to [gmail.com]
4. Add Page --> Add Blog Portlet
5. Add Blog Entry
6. Click on Wrench icon --> Configuration
Email From --> User types [Administrator] in Name field, email in Email field
Entry Added Email --> Flag Enable Check box, User adds content to Subject and Body field
Entry Updated Email --> Flag Enable Check box, User adds content to Subject and Body field
8. Create New User --> Assign to Community
9. Login as New User
10. Subscribe to Blogs
11. SA edits blog entry
12. User logins to gmail account to verify email update notification
User does not receive any email on entry update.
The Entry Updated E-mail is broken. However, Entry Added Email is working just fine.