C# How to get the send of behalf email address in outlook add-in

Question

I'm trying to get the sender email address from email that is send using another email address. The sender as shows in outlook is [email protected] on behalf of User Name [[email protected]]. The MAPI object has a method SentOnBehalfOfName that returns "User Name" but not the email address. Does anyone know how to receive [email protected] field?

Alin Alin · Accepted Answer · 2010-02-13T18:35:16

using System;
using System.Runtime.InteropServices;
using System.Diagnostics;
using System.Reflection;

namespace Helpers
{
    internal class EmailHelper
    {
        public static string GetSenderEmailAddress(Microsoft.Office.Interop.Outlook.MailItem mapiObject)
        {
            Microsoft.Office.Interop.Outlook.PropertyAccessor oPA;
            string propName = "http://schemas.microsoft.com/mapi/proptag/0x0065001F";
            oPA = mapiObject.PropertyAccessor;
            string email = oPA.GetProperty(propName).ToString();
            return email;
        }
    }
}

C# How to get the send of behalf email address in outlook add-in

3 Answers