I'm trying to link an SPEmailEventReceiver to my document library..

First of all I created the EventReceiver using the Visual Studio 2010 Add -> Event Receiver -> List Email Events -> Document Library -> The list received an e-mail message

Then I wrote down the code in the generated class:

namespace ProvaEmailEvent.EventReceiver1
/// <summary>
/// List Email Events
/// </summary>
public class EventReceiver1 : SPEmailEventReceiver
   /// <summary>
   /// The list received an e-mail message.
   /// </summary>
   public override void EmailReceived(SPList list, SPEmailMessage emailMessage, String receiverData)
       SPUser currentUser = list.ParentWeb.CurrentUser;
       Guid listGUID = list.ID;

       SPSecurity.RunWithElevatedPrivileges(() =>
           using (SPSite sito = new SPSite(list.ParentWebUrl))
               using (SPWeb web = sito.OpenWeb())

                   foreach (SPEmailAttachment attach in emailMessage.Attachments)
                       SPList elevatedList = web.Lists[listGUID];
                       SPFile file = elevatedList.RootFolder.Files.Add(attach.FileName, attach.ContentStream);
                       SPListItem item = file.Item;
                       AssignPermissionsToItem(item, currentUser, SPRoleType.Contributor);

   public static void AssignPermissionsToItem(SPListItem item, SPPrincipal obj, SPRoleType roleType)
       SPRoleAssignment roleAssignment = new SPRoleAssignment(obj);
       SPRoleDefinition roleDefinition = item.Web.RoleDefinitions.GetByType(roleType);



The elements.xml file contains:

 <?xml version="1.0" encoding="utf-8"?>
<Elements xmlns="http://schemas.microsoft.com/sharepoint/">
 <Receivers ListTemplateId="101">


In sharepoint log I found messages like this (when sending an email):

 Documents _ Microsoft.SharePoint.Utilities.SPEmailMessage __   18fd777b-039b-402b-ad8a-1e0a5e534d88
 The user does not exist or is not unique
Warning     An error occurred while processing the incoming e-mail file C:\inetpub\mailroot\Drop\8d8bea9e01cd963600000007.eml. The error was: Object reference not set to an instance of an object..    18fd777b-039b-402b-ad8a-1e0a5e534d88
    The Incoming E-Mail service has completed a batch.  The elapsed time was 00:00:00.0156250.  The service processed 1 message(s) in total.  Errors occurred processing 1 message(s): Message ID: <[email protected]> 

I tried also with blank code or with a single instruction that wrote down something in the logs...

Any suggestion?

1 Answer 1


It might be that you have a nullpointer exception.
I would try debugging the receiver, like this:

  • Deploy your solution.
  • Restart the SharePoint Timer Service (From services).
  • In VS click Tools -> Attach to Process.
  • Click Refresh
  • Find the one called OWSTIMER.EXE and attach to this.

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