邮件发送方法（不基于模板）

邮件发送类
#region Send e-mail

        /// <summary>
        /// 用SMTP设置发送MailMessage邮件
        /// </summary>
        public static void SendMailMessage(MailMessage message)
        {
            if (message == null)
                throw new ArgumentNullException("message");

            try
            {
                message.IsBodyHtml = true;
                message.BodyEncoding = Encoding.UTF8;
                SmtpClient smtp = new SmtpClient(BlogSettings.Instance.SmtpServer);
                // don't send credentials if a server doesn't require it,
                // linux smtp servers don't like that 
                if (!string.IsNullOrEmpty(BlogSettings.Instance.SmtpUserName)) {
                    smtp.Credentials = new System.Net.NetworkCredential(SmtpUserName,SmtpPassword);
                }
                smtp.Port = SmtpServerPort;
                smtp.EnableSsl = EnableSsl;//bool型
                smtp.Send(message);
                OnEmailSent(message);
            }
            catch (SmtpException)
            {
                OnEmailFailed(message);
            }
            finally
            {
                // 关闭线程销毁.
                message.Dispose();
                message = null;
            }
        }

        /// <summary>
        ///在另一个异步发送邮件对象.
        /// </summary>
        /// <param name="message">The message to send.</param>
        public static void SendMailMessageAsync(MailMessage message)
        {
            ThreadPool.QueueUserWorkItem(delegate { SendMailMessage(message); });
        }

        /// <summary>
        /// 邮件发送成功
        /// </summary>
        public static event EventHandler<EventArgs> EmailSent;
        private static void OnEmailSent(MailMessage message)
        {
            if (EmailSent != null)
            {
                EmailSent(message, new EventArgs());
            }
        }

        /// <summary>
        /// 邮件发送失败
        /// </summary>
        public static event EventHandler<EventArgs> EmailFailed;
        private static void OnEmailFailed(MailMessage message)
        {
            if (EmailFailed != null)
            {
                EmailFailed(message, new EventArgs());
            }
        }

        #endregion



具体方法调用
#region Send e-mail

private bool SendEmail(string email, string name, string subject, string message)
    {
        try
        {
            using (MailMessage mail = new MailMessage())
            {
                mail.From = new MailAddress(BlogSettings.Instance.Email, name);//BlogSettings默认设置的邮件地址
                mail.ReplyTo = new MailAddress(email, name);

                mail.To.Add(BlogSettings.Instance.Email);////BlogSettings默认设置的邮件地址
                mail.Subject =" e-mail - " + subject;

                mail.Body = "<div style=\"font: 11px verdana, arial\">";
                mail.Body += Server.HtmlEncode(message).Replace("\n", "<br />") + "<br /><br />";//内容Html转换
                mail.Body += "<hr /><br />";
                mail.Body += "<h3>Author information</h3>";
                mail.Body += "<div style=\"font-size:10px;line-height:16px\">";
                mail.Body += "<strong>Name:</strong> " + Server.HtmlEncode(name) + "<br />";
                mail.Body += "<strong>E-mail:</strong> " + Server.HtmlEncode(email) + "<br />";
                if (HttpContext.Current != null)
                {
                    mail.Body += "<strong>IP address:</strong> " + HttpContext.Current.Request.UserHostAddress + "<br />";
                    mail.Body += "<strong>User-agent:</strong> " + HttpContext.Current.Request.UserAgent;
                }

                if (txtAttachment.HasFile) //txtAttachment为上传附件服务器控件
                {
                    Attachment attachment = new Attachment(txtAttachment.PostedFile.InputStream, txtAttachment.FileName);
                    mail.Attachments.Add(attachment);
                }

                SendMailMessage(mail);//发送邮件
            }

            return true;
        }
        catch (Exception ex)
        {
            return false;
        }
    }

#endregion