在IIS中使用C#新建Outlook窗口

我试图打开带有body的outlook窗口来发送消息。当我和我的本地人一起工作时，它会完美地打开。但是当我使用IIS时，outlook窗口不会打开。

public static void SendMailInOutlook(Page CurrentPage, Type ScriptType,
    string Subject, string Recipients, Dictionary<string, string> emailInputs, 
    string emailTemplatePath)
{
    static Microsoft.Office.Interop.Outlook.Application outlookApp;
    static Microsoft.Office.Interop.Outlook._MailItem mailItem;
    outlookApp = new Microsoft.Office.Interop.Outlook.Application();
    mailItem = (Microsoft.Office.Interop.Outlook._MailItem)outlookApp.CreateItem(
        Microsoft.Office.Interop.Outlook.OlItemType.olMailItem);
    mailItem.Subject = Subject;
    mailItem.To = Recipients;
    mailItem.HTMLBody = SendMail.GetEmailContent(emailInputs, emailTemplatePath);
    Thread newThread = new Thread(SendEmailToOutLook);
    newThread.Start();                    
} 
static void SendEmailToOutLook()
{
    string sMsg = "Email sent successfully.";
    try
    {
        mailItem.Display(true);
    }
    catch (Exception ex)
    {
        sMsg = ex.Message;
    }
}