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Editorial Team
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Asked: 2026-06-11T20:12:56+00:00

Not sure if this question has been asked elsewhere… For a website project that

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Not sure if this question has been asked elsewhere…

For a website project that I’m working on, I created an ASPX web form that will send an email containing the contents of the form on button click. I tried it and it worked when I’m using the Yahoo SMTP server and testing using my personal Yahoo email address (+ specifying the username and password).

However, it wouldn’t work when I’m using the SMTP server for mail messages for the website (after I’ve created a new admin email account in the website).

The website is up and running and I’m able to send an email to the website’s admin email account (through Yahoo) but just not when sending through the ASPX web form.

Here is the code for using the Yahoo SMTP server and it works fine:

    SmtpServer.Credentials = New Net.NetworkCredential("username@yahoo.com", "password")
    SmtpServer.Port = "25"
    SmtpServer.Host = "smtp.mail.yahoo.com"
    mail.From = New MailAddress("username@yahoo.com")
    mail.To.Add("username@yahoo.com")
    mail.Subject = "RE: Message Subject"
    mail.Body = "Message goes here."
    SmtpServer.Send(mail)

Now, here is the code for using my website’s SMTP server which doesn’t work:

    SmtpServer.Port = "25"
    SmtpServer.Host = "127.0.0.1"
    mail.From = New MailAddress("admin@awesomewebsite.org.au")
    mail.To.Add("admin@awesomewebsite.org.au")
    mail.Subject = "RE: Message Subject"
    mail.Body = "Message goes here."
    SmtpServer.Send(mail)

These are the correct port and host numbers given by the web hosting company that hosts the website. They also said that username and password are not needed. I also tried appending this to the beginning of the code but it still wouldn’t work:

    SmtpServer.Credentials = New Net.NetworkCredential()

or even

    SmtpServer.Credentials = New Net.NetworkCredential("", "")

I really don’t know what to do. Please help this newbie out. Any response is appreciated.

By the way, the error message that I get when I test this out appears in a message box: “Failure sending mail.”

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1 Answer

  1. Editorial Team

    You need to create an email account in your web site and use those credentials to send the mail just as you did with yahoo (This can be done in your admin portal of the website but some hosting providers will charge you separately for the email service). Further more the correct smtp server is also should be given, that depends on your hosting provider. You can get that information from your hosting provider. 127.0.0.1 will not work here anyway.

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