Web Forms :: Gmail Error / SMTP Server Requires A Secure Connection Or Client Was Not Authenticated
Jun 16, 2015
How to fix this error,
"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"
I want to send a email without using gmail domain but its giving error given below...
The SMTP server requires a secure connection or the client was not authenticated. The server response was: Relaying not allowed - sender domain not local
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
I have written the above code and im getting an error as below-System.Net.Mail.SmtpException: 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 at
System.Net.Mail.MailCommand.CheckResponse(SmtpStatusCode statusCode, String response) at System.Net.Mail.MailCommand.Send(SmtpConnection conn, Byte[] command, MailAddress from, Boolean allowUnicode) at System.Net.Mail.SmtpTransport.SendMail(MailAddress sender, MailAddressCollection recipients, String deliveryNotify, Boolean allowUnicode, SmtpFailedRecipientException& exception) at System.Net.Mail.SmtpClient.Send(MailMessage message) at smtptest._Default.btnSend_Click(Object sender, EventArgs e) in c:usersadministratordocumentsvisual studio 2010ProjectssmtptestsmtptestDefault.aspx.cs:line 71
Its working on local but when im hosting my application im getting above error
using (MailMessage mm = new MailMessage("myid@gmail.com","reciverid@yahoo.com")) { mm.Subject = "test"; mm.Body = "email testing"; mm.IsBodyHtml = false; SmtpClient smtp = new SmtpClient();
I'm using Visual Studio 2008, and my database is SQL Server 2000.
I want to add a connection to the Server Explorer in VS. The Data source is Microsoft SQL Server (SqlClient). After entering in all my information and I click Test Connection, it is successful.
But when I click OK, I get the error:
Unable to add data connection. ExecuteScalar requires an open and available connection. The connection's current state is closed.
We're having an error similar to the one detailed here. We get the error noted above when trying to do AD authentication from our .net (3.5) mvc 2 app. This is our first .net mvc app ...
http://forums.asp.net/t/1161047.aspx
- We are re-using a forms auth library written for a .Net 2 app
- that library/app/config used a service account with min. privileges for binding to AD
- This error occurs in VS 2008, have not tried deploying the app to a server yet (a little early for that)
- like the other user at the previously referenced thread, I can get the 'unable to establish ...' error to go away and display the log on page by putting *MY* credentials in instead of the service account (but not successfully authenticate)
- moving the service account into the same AD OU as my account does not seem to change it ... only using my account credentials does.
- trust level is set to full
Is this some odd permissions trick that is new with .Net 3.5 (even though the ADmembershipProvider is still a 2.0 libary)? This should have nothing to do with MVC itself.
Config looks like this (very standard, like every one else's)
[Code]....
The line/portion highlighted in the debug/stacktrace is:
I have configured gmail's free smtp server for my web app and previously I was using smtp server configured at the server.
So I have changed my smtp settings accordingly but my app isn't sending any email and giving me error connection time out, third party tool isn't responding after many retrials.
Here are my settings-
SmtpClient smtpClient = new SmtpClient("mail.MyWebsiteDomainName.com", 25); smtpClient.Credentials = new System.Net.NetworkCredential("info@MyWebsiteDomainName.com", "myIDPassword"); smtpClient.UseDefaultCredentials = true;....
My PasswordRecovery Control is not working. It is giving me SMTP problem. I set my proper gmail address with port number, valid user name and password. But not working? Do I require to set more settings?
The SMTP server requires a secure connection or the client was not authenticated. The server response was: 5.7.0 Must issue a STARTTLS command first. pg3sm5232120pbc.2
I deployed my MVC app to IIS 7.0 and I keep getting the following error; ExecuteNonQuery requires an open and available Connection. The connection's current state is closed I dont get this with the app locally on my machine. Where could this error be occurring??
We are currently migrating our test databases to a new server and I am switching one of our sites over to use them. When running the application from my development box it hits the database just fine. However when I compile and push the code out to our test server and try to use the same datbase I get the ExecuteNonQuery requires an open and available Connection. The connection's current state is closed error. I cannot seem to figure out why. Also when I point the site at our old test server it works just fine.
If I just have ADProvider1 it works, when I add ADProvider2, even though for testing I only use ADProvider1 I get an error: "Unable to establish secure connection with the server" Am I adding the second provider to the membership section incorrectly?
using (MailMessage mm = new MailMessage("soporte@linknred.com", correo1.Text.Trim())) { mm.Subject = "Activacion de Cuenta"; string body = "Hola " + correo1.Text.Trim() + ", " + "Bienvenido a LinknRed"; body += "<br /><br />Por Favor haz Click en el Enlace Siguiente Para Activar Tu Cuenta";
I just installed sql server 2008 R2 on my computer. I am trying to connect to sql server throught my C# code and everytime I run the C# program,
I get this error "A network-related or instance-specific error occurred while establishing a connection to SQL Server.
The server was not found or was not accessible. Verify that the instance name is correct and that SQL Server is configured to allow remote connections. (provider: Named Pipes Provider, error: 40 - Could not open a connection to SQL Server) "
The connection string that I used in my web.config file is
[Code]....
I am not sure what am I doing wrong, but I followed this article below step by step and still I am getting the same error
Getting the following error when browsing .net 2.0 application System.Data.OracleClient requires Oracle client software version 8.1.7 or greater.
I have setup a .net 2.0 application with oracle backend on windows server 2008 R2. I have oracle client 11g installed on the server for the application to talk to the oracle database. This worked well when the .net 2.0 application was hosted on windows server 2003 and oracle client 10g. But when it is hosted on server 2008 with new oracle client it is giving the above error when browsing the page. This error occurs when the connection is opened inside the c# code.
The error that I keep recieving is:The SMTP server requires a secure connection or the client was not authenticated. The server response was: 5.7.0 Must issue a STARTTLS command first. 35sm26203922ibs.22
TL;DR - Any webapp devs out there able to squeeze performance out of using gmail as SMTP server without a 3-10 minute delay to delivery?I'm looking for some feedback from developers who are using gmail as a secure SMTP server for use with Webapps.Within the past 2 weeks, my company has switched to gmail to host email for our domains.I have a few webapps that send from our ISP server, but I'd like to refactor the code to use gmail with our domain name. I know the ISP can rig things up, but I don't want relay issues.I have gmail sending for the Webapps and it's more or less working. On ASP/IIS, I'm using SSL and on PHP Linux, I'm using TLS.It seems that TLS (port 587) works better than plain old SSL (port 465), but the overall performance difference seems minimal.What concerns me is that there is often a significant delay (10-20 minutes at times) to get email to a recipient no matter which method I use to send via gmail.While I understand this can happen in any environment, I am used to fast delivery. Use case is salespeople talking to customers and needing to get email to them very quickly using the Webapp. Before the gmail switch, usually less than a minute to deliver. Now, it is 3-4 minutes minimum.Am I crazy to try to use gmail for this purpose? There seem to be a lot of devs using it, so just wanting to know how it works out for them/you.
I have written the following code for sending mail.But i am getting error as failure sending mail.I can send mail when the network host is smtp.gmail.com.Heres the code
MailMessage mm = new MailMessage(); mm.From = new MailAddress(ConfigurationManager.AppSettings["Email"].ToString()); mm.To.Add(new MailAddress("gopikshnan@gmail.com")); mm.Subject = Subject; mm.Body = Body;
I am a rookie when it comes to SSL and I need to secure a page that requires credit card processing. What steps are involved in tackling this? Is it a seamless intregration point once the cert is setup on the server?
I am trying to send email from my asp .net code ,it is sending email to email ids except gmail.com. all mails with gmail.com is going into my Badmail folder in inet pub folder in my local system.
SmtpClient client = new SmtpClient(); client.Host = "mail.abc.com"; client.DeliveryMethod = SmtpDeliveryMethod.PickupDirectoryFromIis; client.Credentials = new System.Net.NetworkCredential("ab", "rr"); client.Port = 25; string to = "arvind.abes@gmail.com"; string from = "rvsales@westrvwholesaler.com"; MailMessage mail = new MailMessage(from, to); mail.Subject = "hello......?"; mail.IsBodyHtml = true; mail.Body = "hi, how are you?may be this will work"; mail.Priority = MailPriority.High; //client.EnableSsl = true; try { client.Send(mail); } catch (Exception ex) { Exception ex2 = ex; string errorMessage = string.Empty; while (ex2 != null) { errorMessage += ex2.ToString(); ex2 = ex2.InnerException; } Response.Write(ex2.Message); } mail.Dispose();
a couple weeks ago, my ASP.NET website stopped sending user comments which I implemented by emailing those comments to my email account through Gmail SMTP server [URL]. I opened the project on my development machine and again it fails to send the email after a couple minutes with the following exception message:
Failure sending mail
Unable to read data from the transport connection: net_io_connectionclosed.
I'm using Gmail's SMTP with port 465, and MailClient.EnableSSL = True.
The weird thing is my Office Outlook 2007 is using the same settings and it doesn't have any problems sending mail using the same Gmail account.