HMailServer发送邮件并请求回执

        public static void SendHMail(MailAddress mailTo, string mailSubject, string mailBody, MailAddress cc = null)
        {
            string MAIL_FROM = "test@test.com";
            string body = System.DateTime.Now.ToString() + "<br/>";
            body += mailBody + "<br/><br/><div style=\"font-size: 25px; font-weight: bold;\">Regards<br/>" + MAIL_FROM + "</div>";
            MailMessage mail = new MailMessage
            {
                From = new MailAddress(MAIL_FROM),
                Subject = mailSubject,
                Body = body,
                BodyEncoding = Encoding.UTF8,
                IsBodyHtml = true
            };
            mail.Headers.Add("Disposition-Notification-To", "<receipt@xxx.com>");//接收回执信息的邮箱地址
            mail.To.Add(mailTo);
            if (cc != null)
            {
                mail.CC.Add(cc);
            }

            SmtpClient smtpClient = new SmtpClient();
            smtpClient.Host = "100.168.168.168";
            smtpClient.Port = Convert.ToInt32(25);
            smtpClient.DeliveryMethod = SmtpDeliveryMethod.Network;
            smtpClient.Credentials = new NetworkCredential("userName", "passWord");

            smtpClient.Send(mail);
        }

需要引用System.Net.Mail.其中

mail.Headers.Add("Disposition-Notification-To", "<receipt@xxx.com>");

实现了请求回执功能，第二个参数是接收回执的邮箱。

HMail邮件服务器搭建没什么好说的，执行安装程序，一直下一步就可以完成安装。

安装完成以后，可以通过OutLook连接HMail.配置如下：