using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Microsoft.SharePoint;
using Microsoft.SharePoint.Utilities;namespace Sample{
    public class Class1 : SPEmailEventReceiver
    {
        public override void EmailReceived(SPList oList, SPEmailMessage oMessage,  string strReceiverData)   
        {  
            SPListItem oListItem = oList.Items.Add();  
            oListItem["Title"] = oMessage.Headers["Subject"];  
            oListItem["Body"] = oMessage.HtmlBody;  
            oListItem.Update();foreach (SPEmailAttachment attachment in oMessage.Attachments)
            {
                byte[] attachmentArray = new byte[attachment.ContentStream.Length];
                attachment.ContentStream.Read(attachmentArray, 0, (int)attachment.ContentStream.Length);
                oList.RootFolder.Files.Add(attachment.FileName, attachmentArray);
            }
        }
    }
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Microsoft.SharePoint;namespace RegisterEvent
{
    class Program
    {
        static void Main(string[] args)
        {
            string url = @"http://mossdev1/fa/corpsystem";
            SPSite curSite = new SPSite(url);
            SPWeb curWeb = curSite.OpenWeb();int t = 0;
            foreach (SPList list in curWeb.Lists)
            {
                Console.WriteLine(t++ + ", " + list.Title);
            }
            SPList commentsList = curWeb.Lists["title value"];string asmName = "IISZ.SP.MailHandler, Version=1.0.0.0, Culture=neutral, PublicKeyToken=a3efae80b726e354";
            string className = "IISZ.SP.MailHandler.Class1";for ( int i = 0 ; i <  commentsList.EventReceivers.Count ; i ++ )
            {
                Console.Write(commentsList.EventReceivers[i].Class.ToString());
                 commentsList.EventReceivers[i].Delete();
                 Console.WriteLine(" -- deleted!");
            }
            commentsList.EventReceivers.Add(SPEventReceiverType.EmailReceived, asmName, className);
            foreach (SPEventReceiverDefinition srd in commentsList.EventReceivers)
            {
                Console.WriteLine(srd.Class.ToString() + " -- added!" );
            }

            Console.ReadLine();
        }
    }
}