I am the owner of http://www.monstermmorpg.com which is a free to play browser based monster role playing game. I have a very important announcement to send my above 300k members. I already have email sending software but they drop to the spam. So i want to improve my chances of dropping inbox. I am going to give you all details.

Alright my domain registrar is : http://www.godaddy.com/

My hosting company is : http://www.leaseweb.com/en

This is my setting at leaseweb:

This is my DNS settings at Godaddy:

This is how I send emails:

  MailMessage mail = new MailMessage();
  mail.To.Add(EmailAdress);
  mail.From = new MailAddress("MonsterMMORPG NoReplay <[email protected]>");
  mail.Subject = "Title Of Mail";
  string Body = "Body Of Mail";
  mail.Body = Body;
  mail.IsBodyHtml = true;
  SmtpClient smtp = new SmtpClient();
  smtp.DeliveryMethod = SmtpDeliveryMethod.Network;
  smtp.UseDefaultCredentials = true;
  smtp.Host = "85.17.154.139";
  smtp.Port = 25;
  smtp.Send(mail);

Thanks for every kind of answer. I did not make any special setting at SMTP: