使用Redemption（RDO）发送邮件

RDO

RDO

RDOSessionClass rdoSession = new RDOSessionClass();
rdoSession.LogonExchangeMailbox("username", "server");

// Create mail object and send mail
RDOMailClass m = (RDOMailClass)rdoSession.GetSharedDefaultFolder("user", rdoDefaultFolders.olFolderInbox).Items.Add("IPM.Mail");
m.Recipients.Add(_mail.Recipient);
m.Recipients.ResolveAll(null, null);
m.Subject = _mail.Subject;
m.Body = _mail.Body;
m.SenderEmailAddress = "email@address.domain";
m.Send();