私はこれが私のコードでasp.netで

Question

をメールやメッセージを送信するためにコーディングしたい：

string from = "rashmi@example.com"; 
string to = "rashmi@example.com"; 
string mailSubject = "mail demo"; 
string mailBody = "mail sent successfully"; 

MailMessage mess = new MailMessage(from, to, mailSubject, mailBody); 
mess.IsBodyHtml = true; 

SmtpClient emailClient = new SmtpClient("192.168.43.1", 25); //Server ip & port 
emailClient.UseDefaultCredentials = false; 
emailClient.Credentials = new System.Net.NetworkCredential("rashmi@example.com", "****password****"); 

try 
{ 
    emailClient.Send(mess); 
    Response.Write("message sent"); 
} 
catch (Exception ex) 
{ 
    Response.Write("Exception caught in CreateTestMessage1(): {0}"+ ex.ToString()); 
} 

が、私はこのエラーを取得：

Exception caught in CreateTestMessage1(): {0}System.Net.Mail.SmtpException: Service not available, closing transmission channel. The server response was: Cannot connect to SMTP server 192.168.43.1 (192.168.43.1:25), connect error 10061

at System.Net.Mail.SmtpConnection.GetConnection(ServicePoint servicePoint)
at System.Net.Mail.SmtpTransport.GetConnection(ServicePoint servicePoint)
at System.Net.Mail.SmtpClient.GetConnection()
at System.Net.Mail.SmtpClient.Send(MailMessage message) at mail_demo_project.register_mail_demo.submit_Click(Object sender, EventArgs e) in e:\dot net\projects\mail demo project\mail demo project\register_mail_demo.aspx.cs:line 53 error occured...

Answer 1

は、電子メールを送信するために、このコードを使用します。

string From = "fromemailaddress@gmail.com"; 
     MailAddress mailAddress = new MailAddress(From, "Contact Us"); 

     MailMessage mailMessage = new MailMessage(); 
     mailMessage.To.Add("toemailaddress@gmail.com"); 
     mailMessage.From = mailAddress; 
     mailMessage.Subject = Txt_Subject.Text; 

     string mailBody = "User Email: " + Txt_msg.Text + "<br/> User Name: " + Txt_Name.Text + "<br/> Message: " + Txt_msg.Text ; 

     mailMessage.Body = mailBody; 
     mailMessage.Priority = MailPriority.Normal; 
     mailMessage.IsBodyHtml = true; 

     System.Net.NetworkCredential credential = new System.Net.NetworkCredential(From, "password"); 

     SmtpClient smtpClient = new SmtpClient(); 
     smtpClient.DeliveryMethod = SmtpDeliveryMethod.Network; 
     smtpClient.EnableSsl = false; 
     smtpClient.Host = "smtp.gmail.com"; 
     smtpClient.Port = 587; 
     smtpClient.UseDefaultCredentials = true; 
     smtpClient.Credentials = credential; 

     smtpClient.Send(mailMessage); 

セキュリティのセクションであなたのGmailアカウントにセキュリティを変更する必要があります：安全性の低いアプリケーションを許可する：はい