C#发送邮件方法-优快云博客

using System.Net.Mail; 方法一：向单个地址发送邮件，不设置web.config文件 public void SendMail() { string mailto = "to@company.com"; string mailfrom = "from@company.com";
 System.Net.NetworkCredential credential = new System.Net.NetworkCredential("from_username", "from_password"); SmtpClient smtp = new SmtpClient("smtp.company.com"); smtp.Credentials = credential;
 MailMessage message = new MailMessage(mailfrom, mailto); message.SubjectEncoding = System.Text.Encoding.UTF8; message.BodyEncoding = System.Text.Encoding.UTF8; message.Subject = "subject here"; message.Body = "body here"; smtp.Send(message); message.Dispose(); } 方法二、向单个地址发送邮件，设置web.config文件 public void SendMail() { string mailto = "to@company.com"; string mailfrom = "from@company.com"; 
 MailMessage message = new MailMessage(mailfrom, mailto); message.SubjectEncoding = System.Text.Encoding.UTF8; message.BodyEncoding = System.Text.Encoding.UTF8; message.Subject = "subject here"; message.Body = "body here"; smtp.Send(message); message.Dispose(); } 在web.config中添加如下： <system.net> <mailSettings> <smtp from="from@company.com"> <network host="smtp.company.com" port="25" userName="from_username" password="from_password"/> </smtp> </mailSettings> </system.net> 方法三：群发邮件，设置web.config文件 public void SendEmail() { string mailto = "to1@company.com,to2@company.com"; string title = "mail title here"; string content = "mail content here";
 SmtpClient smtp = new SmtpClient(); MailMessage message = new MailMessage(); MailAddressCollection address = new MailAddressCollection(); string[] mailtos = mailto.Split(','); for (int i = 0; i < mailtos.Length; i++) { address.Add(mailtos[i]); } foreach (MailAddress add in address) { message.To.Add(add); } message.SubjectEncoding = System.Text.Encoding.UTF8; message.BodyEncoding = System.Text.Encoding.UTF8; message.Subject = title; message.Body = content; smtp.Send(message); message.Dispose(); address.Clear(); } 在web.config中添加如下： <system.net> <mailSettings> <smtp from="from@company.com"> <network host="smtp.company.com" port="25" userName="from_username" password="from_password"/> </smtp> </mailSettings> </system.net> 采用以上方法，如果运行发信程序的计算机上装有邮件监控等杀毒软件，会有失败的警告，但实际已发送成功。解决办法是关闭杀毒软件的监控功能。
×××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××× 方法四 using System.Web.Mail; public void sendMail() { MailMessage mail1 = new MailMessage(); mail1.Body="body here"; mail1.From="xxx@xxx.com"; mail1.To="yyy@yyy.com"; mail1.Fields.Add("http://schemas.microsoft.com/cdo/configuration/smtpauthenticate",1); mail1.Fields.Add("http://schemas.microsoft.com/cdo/configuration/sendusername","xxx@xxx.com"); mail1.Fields.Add("http://schemas.microsoft.com/cdo/configuration/sendpassword","********"); SmtpMail.SmtpServer="mail.xxx.com"; SmtpMail.Send(mail1); } 以上添加的几个 Fields 是用来作SMTP发信认证的，如果你的发信服务器不需要认证，就可以省略这几句。 ××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××××