private static string Host = System.Configuration.ConfigurationManager.AppSettings["SMTPURL"].ToString(); //SMTP服务器地址
???????private static string Account = System.Configuration.ConfigurationManager.AppSettings["SMTPACCOUNT"].ToString(); ??????//SMTP服务帐号
???????private static string Pwd = System.Configuration.ConfigurationManager.AppSettings["SMTPPWD"].ToString(); ???//SMTP服务密码
???????private static string From = System.Configuration.ConfigurationManager.AppSettings["SMTPFROM"].ToString(); ?//发送方邮件地址
???????public static int SendMail(string subject, string body, string toMail,ref string msg,string icon="") ???????{ ???????????int reslult = -1; ???????????string To = System.Web.HttpUtility.UrlDecode(toMail.Trim()); ??// 收件方邮件地址 ???????????SmtpClient _smtpClient = new SmtpClient(); ???????????_smtpClient.DeliveryMethod = SmtpDeliveryMethod.Network;//指定电子邮件发送方式 ???????????_smtpClient.Host = Host; ;//指定SMTP服务器 ???????????_smtpClient.Credentials = new System.Net.NetworkCredential(Account, Pwd);//用户名和密码 ???????????MailMessage _mailMessage = new MailMessage(From, To); ???????????AlternateView htmlBody = AlternateView.CreateAlternateViewFromString(body, null, "text/html"); ???????????if (!string.IsNullOrEmpty(icon)) ???????????{ ???????????????LinkedResource lrImage = new LinkedResource(icon, "image/gif"); ???????????????lrImage.ContentId = "weblogo"; ???????????????htmlBody.LinkedResources.Add(lrImage); ???????????????_mailMessage.AlternateViews.Add(htmlBody); ???????????} ???????????_mailMessage.Subject = System.Web.HttpUtility.UrlDecode(subject); //主题 ????????????_mailMessage.Body = System.Web.HttpUtility.UrlDecode(body);//内容 ???????????_mailMessage.BodyEncoding = System.Text.Encoding.UTF8;//正文编码 ???????????_mailMessage.IsBodyHtml = true;//设置为HTML格式 ???????????_mailMessage.Priority = MailPriority.High;//优先级 ???????????try ???????????{ ???????????????_smtpClient.Send(_mailMessage); ???????????????reslult = 1; ???????????????msg = "发送成功"; ???????????} ???????????catch (Exception ex) ???????????{ ???????????????reslult = -1; ???????????????msg = ex.Message; ???????????} ???????????return reslult; ???????}.Net 发送邮件
原文地址：https://www.cnblogs.com/plming/p/8142975.html