You can quickly setup Live Articles module to allow your site users to post on your article.
Step 1
Login as Administrator or Superuser. From the Live Articles action menu, click on Settings and scroll down to Permissions.
Step 2
Simply check the security roles for which you would like to grant Authors access
- It will grant the access to user to post on the article
Step 3
Simply check the security roles for which you would like to grant Remote Access
- To post on the article Remotely author should have remote access and author of the article