Asp.net identity confirmation mails going to spam 1

Question

I am using asp.net identity for registering users, but confirmation mails going to spam instead of inbox:

Also as you can see it says Images are not displayed while i am not sending any... Here is my code :

   public Task SendAsync(IdentityMessage message)
        {            
            string html = message.Body;
            string plain = message.Body;
            MailMessage msg = new MailMessage();
            msg.AlternateViews.Add(AlternateView.CreateAlternateViewFromString(html, new ContentType("text/html")));
            msg.AlternateViews.Add(AlternateView.CreateAlternateViewFromString(plain, new ContentType("text/plain")));
            msg.From = new MailAddress("no-reply@leavingstone.net", "nebula");
            msg.To.Add(message.Destination);
            msg.IsBodyHtml = true;
            msg.BodyEncoding = System.Text.Encoding.UTF8;
            msg.Subject = "აქტივაცია";

            new SmtpClient("smtp.mandrillapp.com")
            {
                Port = 25,
                Credentials = ((ICredentialsByHost)new NetworkCredential("xxx"))
            }.Send(msg);

            return Task.FromResult(0);
        }

Answer 1

Well the message is pretty clear.

It contains content that's typically used in spam messages

You should try to make changes in message and subject content

Answer 2

I've just change subject ='აქტივაცია' to subject = activation and problem has been solved. But i had utf-8 encoding and why that thing happens?