UPDATE: See my second post for updated situation

I had set up a "Contact Us" page on my website that sends email using SMTP and information gathered from text boxes and other inputs, etc

Everything worked fine when I tested the site locally

After launching the site, I now get a Security Exception error

Description: The application attempted to perform an operation not allowed by the security policy.  To grant this application the required permission please contact your system administrator or change the application's trust level in the configuration file.

Exception Details: System.Security.SecurityException: Request for the permission of type 'System.Net.Mail.SmtpPermission, System, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' failed.

You can recreate the error by visiting the site, completing the form, and hitting the "Submit" button

http://www.pennlighting.com/literature

I have already tried adding <trust level="Medium" originUrl="" /> to my web.config file, but the ISP has override turned off

On our ISP's FAQ, it states that all applications are set to Medium by default, so I don't understand why I am having this issue 

I am waiting to hear back from the ISP, but their tech support's turnaround has been sub-par and I'd like to resolve this issue as soon as possible

Here is the code behind for the page. I am new to ASP.NET 2.0 and VBScript so if there is anything in my code that could be causing the problem, please let me know. Thanks!

Imports System.Net.Mail

Partial Class literature
    Inherits System.Web.UI.Page

    Protected Sub Submit_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles Submit.Click

        Dim sb As New StringBuilder
        sb.Append("Name: ")
        sb.Append(NameBox.Text)
        sb.AppendLine()
        sb.Append("Email: ")
        sb.Append(EmailBox.Text)
        sb.AppendLine()
        sb.Append("Phone: ")
        sb.Append(PhoneBox.Text)
        sb.AppendLine()
        sb.Append("Fax: ")
        sb.Append(FaxBox.Text)
        sb.AppendLine()
        sb.Append("Company: ")
        sb.Append(CompanyBox.Text)
        sb.AppendLine()
        sb.Append("Address: ")
        sb.Append(AddressBox.Text)
        sb.AppendLine()
        sb.Append("City: ")
        sb.Append(CityBox.Text)
        sb.AppendLine()
        sb.Append("State: ")
        sb.Append(StateBox.SelectedValue)
        sb.AppendLine()
        sb.Append("Zip Code: ")
        sb.Append(ZipBox.Text)
        sb.AppendLine()
        sb.Append("Manufacturer: ")
        sb.Append(ManufacturerBox.Text)

        LitForm.ActiveViewIndex = 1

        SendMail("my@email.com", sb.ToString())

    End Sub

    Protected Sub SendMail(ByVal from As String, ByVal body As String)

        Dim Email As New MailMessage(EmailBox.Text, "my@email.com", "Literature Request", body)

        Dim smtpClient As SmtpClient = New SmtpClient

        smtpClient.Host = "smtp.gmail.com"

        smtpClient.Port = "587"

        smtpClient.EnableSsl = True

        Dim credentials As New System.Net.NetworkCredential("user", "pass")

        smtpClient.Credentials = credentials

        smtpClient.Send(Email)

    End Sub

End Class
 

This post could help you alot:

http://forums.asp.net/p/1111145/1711371.aspx 

It turns out that I made a mistake... on our ISP's FAQ it instructs you to use "localhost" as the SMTP server.

Once I changed the SMTP server to "localhost" I no longer received the security exception error, however the email is still not going through.

I have the form set up on a MultiView so that View1 is the form to be emailed and View2 is a thank you message. In my code behind the script will A) change from View1 to View2 and B) send the email when the form is submitted.

Right now when I submit the information, the View index is changing to the thank you page, but I am not receiving the email.

Turns out this is probably a problem on my side after all, any ideas?
 

Here is the updated code behind

Imports System.Net.Mail

Partial Class literature
    Inherits System.Web.UI.Page

    Protected Sub Submit_Click(ByVal sender As Object,

ByVal e As System.EventArgs) Handles Submit.Click

        Dim sb As New StringBuilder
        sb.Append("Name: ")
        sb.Append(NameBox.Text)
        sb.AppendLine()
        sb.Append("Email: ")
        sb.Append(EmailBox.Text)
        sb.AppendLine()
        sb.Append("Phone: ")
        sb.Append(PhoneBox.Text)
        sb.AppendLine()
        sb.Append("Fax: ")
        sb.Append(FaxBox.Text)
        sb.AppendLine()
        sb.Append("Company: ")
        sb.Append(CompanyBox.Text)
        sb.AppendLine()
        sb.Append("Address: ")
        sb.Append(AddressBox.Text)
        sb.AppendLine()
        sb.Append("City: ")
        sb.Append(CityBox.Text)
        sb.AppendLine()
        sb.Append("State: ")
        sb.Append(StateBox.SelectedValue)
        sb.AppendLine()
        sb.Append("Zip Code: ")
        sb.Append(ZipBox.Text)
        sb.AppendLine()
        sb.Append("Manufacturer: ")
        sb.Append(ManufacturerBox.Text)

        LitForm.ActiveViewIndex = 1

        SendMail("admin@pennlighting.com", sb.ToString())

    End Sub

    Protected Sub SendMail(ByVal from As String, ByVal

body As String)

        Dim Email As New

MailMessage("admin@pennlighting.com",

"admin@pennlighting.com", "Literature Request", body)

        Dim smtpClient As SmtpClient = New SmtpClient

        smtpClient.Host = "localhost"

        Dim credentials As New

System.Net.NetworkCredential("admin@pennlighting.com",

"password")

        smtpClient.Credentials = credentials

        smtpClient.Send(Email)

    End Sub

End Class