[轉貼]c#如何發郵件?

--------------------code---------------------

private void sengmill_net()
  {//.net smtp類進行郵件發送，支援認證，附件添加；
   System.Web.Mail.MailMessage mailmsg = new System.Web.Mail.MailMessage();
   mailmsg.From = this.tb_from.Text.Trim();
   mailmsg.To   = this.tb_to.Text.Trim();
   mailmsg.Body = this.tb_mailBody.Text.Trim();
   mailmsg.Subject = "test mail from hz";
   /* 附件的粘貼, ^_^,笨了點;
   if(this.att1.Value.ToString().Trim()!=string.Empty)
    mailmsg.Attachments.Add(new System.Web.Mail.MailAttachment(this.att1.Value.ToString().Trim()));
   if(this.att2.Value.ToString().Trim()!=string.Empty)
    mailmsg.Attachments.Add(new System.Web.Mail.MailAttachment(this.att2.Value.ToString().Trim()));
   if(this.att3.Value.ToString().Trim()!=string.Empty)
    mailmsg.Attachments.Add(new System.Web.Mail.MailAttachment(this.att3.Value.ToString().Trim()));
   */
   mailmsg.Fields.Add("http://schemas.microsoft.com/cdo/configuration/smtpauthenticate", "1");
   //是否需要驗證，一般是要的    
   mailmsg.Fields.Add
    ("http://schemas.microsoft.com/cdo/configuration/sendusername", "gallon_han");
   //自己郵箱的使用者名稱    
   mailmsg.Fields.Add("http://schemas.microsoft.com/cdo/configuration/sendpassword", "91900");
   //自己郵箱的密碼 
   System.Web.Mail.SmtpMail.SmtpServer = this.tb_smtpserver.Text.Trim();
   System.Web.Mail.SmtpMail.Send(mailmsg);
  }

--------------------補充--------
在郵件群發時, 可以把郵件地址清單用“,” 分割,然後 賦給MailMessage .bcc(代替MailMessage .to)就ok啦