使用redemption回复邮件只是间歇性地设置正文文本

我正在使用下面的方法回复进入业务功能邮箱的邮件。

正在添加的正文文本只是间歇性地被设置。只有当有人通过电子邮件发送到取消订阅邮件,但在数据库中找不到发件人(或在正文中)的电子邮件地址时,才调用此方法,我们希望他们向我们发送他们要取消订阅的邮件地址。

private void replyToMail(OutlookItem item)
        {
            RDOSession session = new RDOSession();
            session.Logon(null, null, null, true, null, null);
            RDOMail thisItem = session.GetMessageFromID(item.EntryID, item.StoreID, null);
            RDOMail reply = thisItem.Reply();

            RDOAddressEntry optingout = session.AddressBook.GAL.ResolveName("optingout");
            //reply.Sender = optingout; this had no effect
            reply.SentOnBehalfOf = optingout;
            reply.Subject = "Automated Response - Could not complete unsubscribe";
            reply.Body = "This is an automated response from the Newsletter unsubscribe system. We couldn't find "+item.Sender+" in our database to unsubscribe you from our mailings.\r\n\r\nPlease reply to this mail and include the email address you want to unsubscribe.\r\n\r\nKind Regards\r\n.";
            reply.Send();

            session.Logoff();
        }