Send user Confirmation email after Registration.

Question

Hello everyone I am trying to implement Email confirmation after user registration. Then I can find the answer from this link http://www.aspsnippets.com/Articles/Send-user-Confirmation-email-after-Registration-with-Activation-Link-in-ASPNet.aspx After using this code I got an error Unable to read data from the transport connection: net_io_connectionclosed. How can I solve this? Please help me. Advance thanks.

Vinay Singh · Answer

Please check the user is and password provided in code

Rajeesh Menoth · Answer

Hi Use proper smtp port id . More about refer my article. Reference : http://www.c-sharpcorner.com/UploadFile/2a6dc5/how-to-send-a-email-using-Asp-Net-C-Sharp/ Similar Threads : http://stackoverflow.com/questions/20228644/smtpexception-unable-to-read-data-from-the-transport-connection-net-io-connect http://stackoverflow.com/questions/17497154/smtpexception-unable-to-read-data-from-the-transport-connection-net-io-connec

Rajeesh Menoth · Answer

Hi In my article I mentioned the authentication issues also. Reference : http://www.c-sharpcorner.com/blogs/smtp-server-requires-a-secure-connection1

Bikesh Srivastava · Answer

Hi Abhilash  Check again your secure app beacuse this error due to this. The SMTP server requires a secure connection or the client was not authenticated. The server response was: 5.5.1 Authentication Required. Learn more at only reason is secure app turn off.

Bikesh Srivastava · Answer

Try this.. private void SendActivationEmail( int userId) { string constr=ConfigurationManager.ConnectionStrings[ constr ].ConnectionString; string activationCode=Guid.NewGuid().ToString(); using (SqlConnectioncon= new SqlConnection(constr)) { using (SqlCommandcmd= new SqlCommand( INSERTINTOUserActivationVALUES(@UserId@ActivationCode) )) { using (SqlDataAdaptersda= new SqlDataAdapter()) { cmd.CommandType=CommandType.Text; cmd.Parameters.AddWithValue( @UserId userId); cmd.Parameters.AddWithValue( @ActivationCode activationCode); cmd.Connection=con; con.Open(); cmd.ExecuteNonQuery(); con.Close(); } } } using (MailMessagemm= new MailMessage( sender@gmail.com txtEmail.Text)) { mm.Subject= AccountActivation ; string body= Hello +txtUsername.Text.Trim()+  ; body+=  Pleaseclickthefollowinglinktoactivateyouraccount ; body+=  +Request.Url.AbsoluteUri.Replace( CS.aspx  CS_Activation.aspx?ActivationCode= +activationCode)+ '>Clickheretoactivateyouraccount.  ; body+=  Thanks ; mm.Body=body; mm.IsBodyHtml= true ; SmtpClientsmtp= new SmtpClient(); smtp.Host= smtp.gmail.com ; smtp.EnableSsl= true ; NetworkCredentialNetworkCred= new NetworkCredential( sender@gmail.com    ); smtp.UseDefaultCredentials= true ; smtp.Credentials=NetworkCred; smtp.Port=587; smtp.Send(mm); } } I have done already in my projectits working fine.

Vinay Singh · Answer

Hi Please upload the code and then test. Region we will not able to send email from local using gmail. so upload it on server and then test. or use some other smtp service to send email

Mani Kandan · Answer

Hello Everyone Thanks for reply me to all. This problem is solved. But another one is raised now. That is The SMTP server requires a secure connection or the client was not authenticated. The server response was: 5.5.1 Authentication Required. Learn more at But I have enabled Gmail secure apps is Turn on. Still this error occurred.