how to enable SMTP Authentication with System.Web.Mail classes?

I have written the code to send email using Mail classes in System.Web.Mail namespace but my smtp server needs to "enable SMTP Authentication" setting.

How can I do this?

I believe this is what you are looking for:

VB Code:

Dim message As New MailMessage
 
        message.To = "[email protected]"
 
        message.From = "[email protected]"
        message.Subject = "Subject
        message.BodyFormat = MailFormat.Html
 
        message.Body = "Body"
 
        message.Fields.Add("http://schemas.microsoft.com/cdo/configuration/smtpserver", "smtp Server Address")
        message.Fields.Add("http://schemas.microsoft.com/cdo/configuration/smtpserverport", 25)
        message.Fields.Add("http://schemas.microsoft.com/cdo/configuration/sendusing", 2) '2 to send using SMTP over the network
        message.Fields.Add("http://schemas.microsoft.com/cdo/configuration/smtpauthenticate", 1) '1 = basic authentication
        message.Fields.Add("http://schemas.microsoft.com/cdo/configuration/sendusername", "SMTP User Name")
        message.Fields.Add("http://schemas.microsoft.com/cdo/configuration/sendpassword", "PASSWORD")
 
        Try
            SmtpMail.Send(message)
        Catch ex As Exception
 
        End Try

unfortunately, those pages/links are no longer available -

I converted this code to C#, which is what I'm using, but still no luck...

I can send the mail just fine from my old smtp server but this new one requires smtp authentication which has put a real dent in my app...

thanks for your help, though; I spent the night researching all over MSDN and learned a few new things - so all was not wasted :thumb:


I did manage to find this bit of information and a component that is supposed to do what I'd like - yet to have bought it and tried though...
SMTP Authentication component for sending email with ASP.NET

My SMTP server also require authentication for sending an email. In the message.fileds part I have to specify my server and account information and it works. Do not atttempt to go to the addresses listed below they are merely schema namespaces.

VB Code:

' Change SMTP Server Address (Ex: mail.domain.com)
message.Fields.Add("http://schemas.microsoft.com/cdo/configuration/smtpserver", "SMTP Server Address")
message.Fields.Add("http://schemas.microsoft.com/cdo/configuration/smtpserverport", 25)
message.Fields.Add("http://schemas.microsoft.com/cdo/configuration/sendusing", 2) '2 to send using SMTP over the network
message.Fields.Add("http://schemas.microsoft.com/cdo/configuration/smtpauthenticate", 1) '1 = basic authentication
' User information (EX: [email][email protected][/email])
message.Fields.Add("http://schemas.microsoft.com/cdo/configuration/sendusername", "SMTP User Name")
' User Password (EX: password)
message.Fields.Add("http://schemas.microsoft.com/cdo/configuration/sendpassword", "PASSWORD")

It is free and it works.

My question to you is does your SMTP server run on the default port (25), and use basic authentication.

Other sources of information:
http://www.codeproject.com/dotnet/SM...entication.asp
http://blogs.wwwcoder.com/pradeepd/a...01/28/236.aspx
[url]http://msdn.microsoft.com/library/default.asp?url=/library/en-us/cdosys/html/_cdosys_schema_configuration.aspp/url]
http://www.eggheadcafe.com/PrintSear...asp?LINKID=622

yes, smtp server runs port 25 and uses basic authentication - but here is the error I am getting:

Code:

---

The message could not be sent to the SMTP server. The transport error code was 0x80040217. The server response was not available
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.Runtime.InteropServices.COMException: The message could not be sent to the SMTP server. The transport error code was 0x80040217. The server response was not available

Source Error:


Line 177:                        try
Line 178:                        {
Line 179:                                SmtpMail.Send(message);
Line 180:                        }
Line 181:                        finally{}
 

Source File: c:\inetpub\wwwroot\rosary\registration.aspx.cs    Line: 179

Stack Trace:


[COMException (0x80040211): The message could not be sent to the SMTP server. The transport error code was 0x80040217. The server response was not available
]

[TargetInvocationException: Exception has been thrown by the target of an invocation.]
  System.RuntimeType.InvokeDispMethod(String name, BindingFlags invokeAttr, Object target, Object[] args, Boolean[] byrefModifiers, Int32 culture, String[] namedParameters) +0
  System.RuntimeType.InvokeMember(String name, BindingFlags invokeAttr, Binder binder, Object target, Object[] args, ParameterModifier[] modifiers, CultureInfo culture, String[] namedParameters) +473
  System.Type.InvokeMember(String name, BindingFlags invokeAttr, Binder binder, Object target, Object[] args) +29
  System.Web.Mail.LateBoundAccessHelper.CallMethod(Type type, Object obj, String methodName, Object[] args)
  System.Web.Mail.LateBoundAccessHelper.CallMethod(Object obj, String methodName, Object[] args)

[HttpException (0x80004005): Could not access 'CDO.Message' object.]
  System.Web.Mail.LateBoundAccessHelper.CallMethod(Object obj, String methodName, Object[] args)
  System.Web.Mail.CdoSysHelper.Send(MailMessage message)
  System.Web.Mail.SmtpMail.Send(MailMessage message)
  Rosary.registration.Button2_Click(Object sender, EventArgs e) in c:\inetpub\wwwroot\rosary\registration.aspx.cs:179
  System.Web.UI.WebControls.Button.OnClick(EventArgs e)
  System.Web.UI.WebControls.Button.System.Web.UI.IPostBackEventHandler.RaisePostBackEvent(String eventArgument)
  System.Web.UI.Page.RaisePostBackEvent(IPostBackEventHandler sourceControl, String eventArgument)
  System.Web.UI.Page.RaisePostBackEvent(NameValueCollection postData)
  System.Web.UI.Page.ProcessRequestMain()

---

Here is the code i am using:

Code:

---

                        MailMessage message = new MailMessage();

                        message.To = "[email protected]";

                        message.From = "[email protected]";
                        message.Subject = "Testing Internet SmtpMail";
                        message.BodyFormat = MailFormat.Html;

                        message.Body = "body";

                        message.Fields.Add("http://schemas.microsoft.com/cdo/configuration/smtpserver", "smtp.thecrystalrosary.com");
                        message.Fields.Add("http://schemas.microsoft.com/cdo/configuration/smtpserverport", 25);
                        message.Fields.Add("http://schemas.microsoft.com/cdo/configuration/sendusing", 2); //2 to send using SMTP over the network
                        message.Fields.Add("http://schemas.microsoft.com/cdo/configuration/smtpauthenticate", 1); //1 = basic authentication
                        message.Fields.Add("http://schemas.microsoft.com/cdo/configuration/sendusername", "username");
                        message.Fields.Add("http://schemas.microsoft.com/cdo/configuration/sendpassword", "password");

                        try
                        {
                                SmtpMail.Send(message);
                        }
                        catch (Exception e)
                        {
                                // trap here
                        }

---

I have an email server that requires authentication and I turned around and added to the email server the ip address of the webserver so that authentication is not required from this IP address.

Can you do the same with your email server? this would save a lot of headache. I started down the path your on and then just opened up my email server only that that one IP address as a trusted host.

Jerel

I do agree that Phenglai's solution is one of the easiest ways to solve this problem (unless it's another problem). I did not have that option and the code works fine for me.

I googled the error code and came up with some other possibilities (hence my other problems statement)

This may be happening if you are using some sort of proxy configuration on the box sending the emails, or you have some security software blocking port 25 on the box sending the emails. I came up with this from:
http://www.systemwebmail.com/faq/4.2.9.aspx
http://victor.carotena.net/weblog/archives/000016.php

You may want to investigate this (especially if you can allow the problem box to be allowed to relay and you continue having the problem)

I've still been plagued with this problem from this particular smtp server - I have another server that doens't give a bit of a tiff -

in any case, I've discovered a great assembly that pretty much does everything and anything you would want it to do -if you have .NET framework of 1.1 (below that, authentication won't work)... and I'm not a spokesperson for the group, either -

ASP.NET Email for SMTP has a nice little component- you can check out the evaluation version, fully functional, too - before you decide if it's worth your application's time and money -

I've checked it out and was quite impressed with it's features, not to mention it's extensive help file - amazing!!

anyway, for the meantime, I will use my other smtp mail server until my resolves with this other smtp are sorted out...

I'd like to thank you for all of your help and time spent in dealing with this -