Skip to content

Instantly share code, notes, and snippets.

@rasmuseeg

rasmuseeg/SMTP.aspx

Last active January 20, 2022 00:47
Show Gist options
  • Star 0 You must be signed in to star a gist
  • Fork 1 You must be signed in to fork a gist
  • Save rasmuseeg/45cc0fddd01917ec98fd6dacc425a432 to your computer and use it in GitHub Desktop.
Save rasmuseeg/45cc0fddd01917ec98fd6dacc425a432 to your computer and use it in GitHub Desktop.
Download ZIP
Simple SMTP test aspx page for sending and testing smtp configuration and server response.
Raw
SMTP.aspx
<%@ Import Namespace="System.IO" %>
<%@ Import Namespace="System.Configuration" %>
<%@ Import Namespace="System.Net.Mail" %>
<%@ Import Namespace="System.Net.Sockets" %>
<%@ Import Namespace="System.Net.Security" %>
<%@ Import Namespace="System.Net.Configuration" %>
<%@ Import Namespace="Umbraco.Core.Configuration" %>
<%@ Page Language="C#" %>
<script language="c#" runat="server">
void SendEmail_OnClick(Object sender, EventArgs e)
{
var config = UmbracoConfig.For.UmbracoSettings();
try
{
using (var client = new System.Net.Mail.SmtpClient())
{
var message = new MailMessage(config.Content.NotificationEmailAddress, this.to.Text);
message.Subject = "Test";
message.Body = "If you read this, you smtp settings and server is configured correctly.";
client.Send(message);
}
EmailMessage.Text = "Email was succesfully sent.";
}
catch (Exception ex)
{
EmailMessage.Text = "[ERROR] Unable to sent email\n\t\t" + ex.ToString();
}
}
void EchoServer_OnClick(Object sender, EventArgs e)
{
var smtpSection = (SmtpSection)ConfigurationManager.GetSection("system.net/mailSettings/smtp");
string username = smtpSection.Network.UserName;
var server = smtpSection.Network.Host;
var port = smtpSection.Network.Port;
try
{
using (var client = new TcpClient())
{
client.Connect(server, port);
// As GMail requires SSL we should use SslStream
// If your SMTP server doesn't support SSL you can
// work directly with the underlying stream
if (smtpSection.Network.EnableSsl)
{
this.log.Text += "<br />SSL is enabled.";
using (var stream = client.GetStream())
using (var sslStream = new SslStream(stream))
{
sslStream.AuthenticateAsClient(server);
using (var writer = new StreamWriter(sslStream))
using (var reader = new StreamReader(sslStream))
{
writer.WriteLine("EHLO " + server);
writer.Flush();
this.log.Text += "<br />Response: " + reader.ReadLine();
Console.WriteLine(reader.ReadLine());
// GMail responds with: 220 mx.google.com ESMTP
}
}
}
else
{
this.log.Text += "<br />SSL is disabled.";
using (var stream = client.GetStream())
using (var writer = new StreamWriter(stream))
using (var reader = new StreamReader(stream))
{
writer.WriteLine("EHLO " + server);
writer.Flush();
this.log.Text += "<br />Response: " + reader.ReadLine();
Console.WriteLine(reader.ReadLine());
// GMail responds with: 220 mx.google.com ESMTP
}
}
}
}
catch (Exception)
{
throw;
}
}
</script>
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title>SMPT server test</title>
</head>
<body>
<form id="form1" runat="server">
<div>
E-mail:<br />
<asp:TextBox ID="to" runat="server" placeholder="Type you e-mail here.."></asp:TextBox>
<asp:Button ID="SendEmail" OnClick="SendEmail_OnClick" Text="Send" runat="server" />
<asp:Literal ID="EmailMessage" runat="server" />
<br />
<br />
Test the server response here:
<asp:Button ID="EchoServer" OnClick="EchoServer_OnClick" Text="ECHO" runat="server" /><br />
<small>If the server response with 220, we're good.</small>
<asp:Literal ID="log" runat="server"></asp:Literal>
</div>
</form>
</body>
</html>
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment