net Email 发送（借助第三方）

 //发送邮件通知    

public void SendEmail(Guid CompanyID)     {        

//发件人邮箱        

opa_company.ID = CompanyID;        

opa_company = OPA_Company.GetEmailInfoByCID(opa_company);        

string sendEmailAddress = opa_company.Email;        

string sendEmailPassWord = opa_company.EmailPwd;        

string SMTP = opa_company.SMTP;        

//收件人邮箱        

opa_company.ID = CompanyID;        

opa_company=OPA_Company.GetEmailInfoByCID(opa_company);        

string ResetEmailAddress = opa_company.Email;        

Email email = new Email();        

email.ID = opa_company.ID;        

email.Name_Sender = "Admin";        

email.Address_Sender = sendEmailAddress;        

email.PassWord_Sender = sendEmailPassWord;        

email.SMTP = SMTP;        

email.Title = "续费通知";        

email.Name_Receiver = opa_company.ContactMan;        

email.Address_Receiver = opa_company.Email;        

SmtpClient sc = new SmtpClient();        

sc.EnableSsl = false;        

sc.Host = email.SMTP;        

sc.Port = 25;        

sc.Credentials = new NetworkCredential(email.Address_Sender, email.PassWord_Sender);        

MailMessage mm = new MailMessage();        

mm.Priority = MailPriority.High;        

mm.From = new MailAddress(email.Address_Sender, email.Name_Sender, Encoding.GetEncoding(936));        

mm.To.Add(email.Address_Receiver);        

mm.Subject = email.Title;        

mm.SubjectEncoding = Encoding.GetEncoding(936);        

mm.IsBodyHtml = true;        

mm.BodyEncoding = Encoding.GetEncoding(936);        

string Content = email.Name_Receiver + "，你好！<br/>贵公司的使用时间即将到期，请提前续费，以免延误工作。<br/>";        

mm.Body = Content;        

sc.Send(mm);

    }