Need help for a Simple Email App using ASP/SMTP

[mturner64]

I'm working on a simple web app to send email. Below is my code:

Imports System.Net.Mail
Partial Class _Default
    Inherits System.Web.UI.Page
 
    Protected Sub SubmitButton_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles SubmitButton.Click
 
        Dim FromAddress As String = "[e-mail]"
 
        'Create the MailMessage instance
        Dim email As New System.Net.Mail.MailMessage(FromAddress, ToTextBox.Text)
 
        'Assign the MailMessage's properties
        email.Subject = SubjectTextBox.Text
        email.Body = BodyTextBox.Text
        email.IsBodyHtml = False
 
        'add attachment
        email.Attachments.Add(New Attachment(FileUpload1.PostedFile.InputStream, FileUpload1.FileName))
 
        'Create the SmtpClient object
        Dim smtp As New SmtpClient
 
        'Send the MailMessage (will use the Web.config settings)
        smtp.Send(email)
        smtp.Host = "mail.se.edu"
 
 
    End Sub

I have added the following code to my webconfig file:

<system.net>
    <mailSettings>
      <smtp from="[e-mail]">
        <network host="mail.se.edu"/>
      </smtp>
    </mailSettings>
  </system.net>

The error I get is as follows:

A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond 164.58.120.84:2 5

WHAT TO DO?

[DrBunchman]

Hi mturner64,

Firstly, you've posted this in the ASP forum which is for Classic ASP only. I'm moved the thread to the .NET forum where you should receive better help.

As for your question, the problem here is probably the connection to your mail host. I'm not 100% sure about this one but you might need to set the Host property of your smtp object before using the Send method.

Also, can you try pinging that host name from the machine which hosts your web pages? It could be a problem with the DNS resolving the name - have you tried using the IP address of your mail server instead?

Dr B

[Plater]

What errors are you getting? The SMTP server should send you an error code and possibly a short message describing the error.

You need to make sure you have a few things first:
1) Does you email host allow smtp connections?
2) Do you have the correct hostname for the smtp server?
3) Does your SMTP host require authentication to send mail (most do)?

[Shashi Sadasivan]

i think you might want to swap these 2 lines

'Send the MailMessage (will use the Web.config settings)
smtp.Send(email)
smtp.Host = "mail.se.edu"

and make it

'Send the MailMessage (will use the Web.config settings)
smtp.Host = "mail.se.edu"
smtp.Send(email)

though this wouldnt help much as you already speified the settings in the config file