Suppose many authors are posting in my blog then how to disallow them to delete their post? Means once they have submitted and post is approved then they can not delete it in future. Thank You.
There is no standard role that allows users to post but not delete, so it looks like you will need a plugin. Have a look at these: http://wordpress.org/extend/plugins/capsman/ http://wordpress.org/extend/plugins/members/ http://wordpress.org/extend/plugins/user-role-editor/