Mail sending

Question

how to send mail on server

 

private void SendActivationEmail(string b)

{

//string constr = ConfigurationManager.ConnectionStrings["ConnectionString"].ConnectionString;

//// string activationCode = Guid.NewGuid().ToString();

//using (SqlConnection con = new SqlConnection(constr))

//{

//}

using (MailMessage mm = new MailMessage("[email protected]", "tomail"))

{

mm.Subject = "Mavro Commitement OTP";

string body = "<div align='center' style='border:1px solid #22313F; background-color:#22313F;'><b style='color:white;background-color:#22313F;width:100%;hieght:40px; font-size:35px;'><a href=www.mavromining.org style='text-decoration:none;'> MavroMining.Org </a></b> </div> ";

body += "<div style='background-color:#E2EBFA;'><b style='margin-top:40PX; margin-left:60px;'>Your Generated One Time Password is: </b>";

body += "<br />";

body += "<br /><br /><b style='margin-top:40PX; margin-left:60px;'>Thanks </b></div>";

mm.Body = body;

mm.IsBodyHtml = true;

SmtpClient smtp = new SmtpClient();

smtp.Host = "mail.mavromining.com";

smtp.EnableSsl = true;

NetworkCredential NetworkCred = new NetworkCredential("[email protected]", "*******");

smtp.UseDefaultCredentials = true;

smtp.Credentials = NetworkCred;

smtp.Port = 25; //smtp.Port = 587

smtp.Send(mm);

}

}

 

 

 

gives error:---

Server does not support secure connections  port:25

and

 

No connection could be made because the target machine actively refused it port:587 

   

 

 

please provide me solution of this problem