HTTP status code for a partial successful request

Question

I have an application that sends messages to users. In a post request a XML string is transferred that consists of all the users that should receive that particular message.

Answer 1

I've dealt with a very similar issue. In this case, I returned a

207 Multi-Status

Now, this isn't strict HTTP, it's part of the WebDAV extension, so if you don't have control over the client too, then this isn't good for you. If you do, you could do something like so:

   
   
     
       user-123
       success
     
     
       user-789
       failure
     
   

But again, this is an HTTP extension, and you need to have control of the client as well.