How to get sender's email when Email type is EX for Outlook?

Question

I am trying to get sender's email address for an Outlook mailbox through C# code. I tried this link but I am getting "Object reference not set to an instance of an object" for senderEmail = objAddressentry.GetExchangeUser().PrimarySmtpAddress line. My code is as follows:

Outlook.Application oApp = new Outlook.Application();
Outlook.NameSpace oNS = oApp.GetNamespace("mapi");
Outlook.MailItem olMail = new Outlook.MailItem();

if (olMail.SenderEmailType == "EX")
{

   var objReply = olMail.Reply();
   var objRecipient = objReply.Recipients[1]; 

   var strEntryId = objRecipient.EntryID;

   var objAddressentry = oNS.GetAddressEntryFromID(strEntryId);
   string senderEmail = objAddressentry.GetExchangeUser().PrimarySmtpAddress;
}

I will appreciate any help.

If it is of any help, I came across this link, but my AddressEntryUserType comes as olExchangeDistributionListAddressEntry, which is why the control doesn't go inside the If branch.

I am trying to convert from VBA code to C#. That's why it must have run fine. How does the code run in C# ? It throws error ? — Kanu Priya, Feb 21 '19 at 08:39
Sorry I have no time to test your c# code but I think you'd try to add "string" before senderEmail. — Victor Ivanidze, Feb 21 '19 at 10:02
@VictorIvanidze Do you have link to convert from VBScript to C# ? — Kanu Priya, Feb 21 '19 at 13:12

score 0 · Accepted Answer · answered Feb 25 '19 at 05:11

As pointed earlier by, my code is correct. It throws the "Object reference not set to an instance of an object" exception for objAddressentry.GetExchangeUser(), when AddressEntryUserType for Sender is of olExchangeDistributionListAddressEntry type. Modified code is as follows:

if (olMail.SenderEmailType == "EX")
   {

         var objReply = olMail.Reply();
         Outlook.Recipient objRecipient = objReply.Recipients[1]; 
         string strEntryId = objRecipient.EntryID;
         Outlook.AddressEntry objAddressentry = oNS.GetAddressEntryFromID(strEntryId);

         if (objAddressentry != null)
         {

             Outlook.ExchangeUser eu = objAddressentry.GetExchangeUser();
             if (eu != null)
                senderEmail = eu.PrimarySmtpAddress; 

          }

 }

How to get sender's email when Email type is EX for Outlook?

1 Answers1