Can only send email via Outlook if Outlook is open

Question

I want to use send emails via Outlook as described here. It works fine as long as I have already opened Outlook. So for example if Outlook is minimized and I execute my code, then I can send an email just fine. But if Outlook is closed, then I get an exception:

{System.Runtime.InteropServices.COMException (0x80004004): Operation aborted (Exception from HRESULT: 0x80004004 (E_ABORT))
   at Microsoft.Office.Interop.Outlook._MailItem.get_Recipients()
   at OutlookExample.Form1.btnSendEmail_Click(Object sender, EventArgs e) in C:\Users\abc\Documents\Visual Studio 2008\Projects\OutlookExample\OutlookExample\Form1.cs:line 28}

Here is the code:

using Outlook = Microsoft.Office.Interop.Outlook;

...

private void btnSendEmail_Click(object sender, EventArgs e)
{
    try
    {
        Outlook.Application oApp = new Outlook.Application();
        Outlook.MailItem oMsg = Outlook.MailItem)oApp.CreateItem(Outlook.OlItemType.olMailItem);
            oMsg.HTMLBody = "Hello, here is your message!";
            oMsg.Subject = "This is a test message";
            Outlook.Recipients oRecips = (Outlook.Recipients)oMsg.Recipients;
            Outlook.Recipient oRecip = (Outlook.Recipient)oRecips.Add("rhr@sonlinc.dk");
            oRecip.Resolve();
            oMsg.Send();
            oRecip = null;
            oRecips = null;
            oMsg = null;
            oApp = null;
    }
    catch (Exception ex)
    {
        MessageBox.Show(ex.ToString());
    }
}

Why doesn't this work?

Edit: Here is the solution

using Outlook = Microsoft.Office.Interop.Outlook;

...

private void btnSendEmail_Click(object sender, EventArgs e)
{
    try
    {
        Outlook.Application oApp = new Outlook.Application();

        // These 3 lines solved the problem
        Outlook.NameSpace ns = oApp.GetNamespace("MAPI");
        Outlook.MAPIFolder f = ns.GetDefaultFolder(Outlook.OlDefaultFolders.olFolderInbox);
        System.Threading.Thread.Sleep(5000); // test

        Outlook.MailItem oMsg = Outlook.MailItem)oApp.CreateItem(Outlook.OlItemType.olMailItem);
            oMsg.HTMLBody = "Hello, here is your message!";
            oMsg.Subject = "This is a test message";
            Outlook.Recipients oRecips = (Outlook.Recipients)oMsg.Recipients;
            Outlook.Recipient oRecip = (Outlook.Recipient)oRecips.Add("rhr@sonlinc.dk");
            oRecip.Resolve();
            oMsg.Send();
            oRecip = null;
            oRecips = null;
            oMsg = null;
            oApp = null;
    }
    catch (Exception ex)
    {
        MessageBox.Show(ex.ToString());
    }
}

SLaks, I wish. Unfortunately I am maintaining VB6 code and just replicated the problem in C#. — Kasper Hansen, Jul 04 '12 at 13:41

score 15 · Accepted Answer · answered Jul 04 '12 at 13:35

The following code has reliably worked for months for me:

            app = new Microsoft.Office.Interop.Outlook.Application();
            Microsoft.Office.Interop.Outlook.NameSpace ns = app.GetNamespace("MAPI");
            f = ns.GetDefaultFolder(OlDefaultFolders.olFolderInbox);
            Thread.Sleep(5000); // a bit of startup grace time.

if outlook was open it uses it, if not its opened it. Of course, if your outlook requires you to login, your code wont allow for that. Some systems make it difficult for you to auto login.

Woodman · Answer 2 · 2019-12-12T09:50:21.157

14

I didn't like the idea to use Thread.Sleep for 5 seconds, so I've found another solution, that worked for me:

All you need is get Inspector object for newly created MailItem

Outlook.Application oApp = new Outlook.Application();
Outlook.MailItem oMsg = (Outlook.MailItem)oApp.CreateItem(Outlook.OlItemType.olMailItem);
Outlook.Inspector oInspector = oMsg.GetInspector;

Answer was published in Google groups originally for Outlook 2007 (but it worked for me with Outlook 2010)

edited Dec 12 '19 at 09:50

answered Jan 29 '14 at 14:58

Woodman

1,108
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11

How does that inspector object help, though? It's not being used anywhere or am I missing something? – B.K. Jan 26 '15 at 00:03
It appeared that Outlook returns Inspector only after it gets initialized properly. That's the trick. You don't have to use it . – Woodman Jan 27 '15 at 18:14
So, do you check to see if it's `null`? Or does it simply force Outlook to initialize if you're trying to get the inspector object and Outlook hasn't been started? – B.K. Jan 28 '15 at 00:55
From what I remember it simply forces Outlook to initialize. And I'm not checking it's value, – Woodman Jan 28 '15 at 09:39

Can only send email via Outlook if Outlook is open

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