How to send email in ASP.Net?

There are a lot of articles about this subject, here are two of them:
Send Mail / Contact Form using ASP.NET and C#[^]
http://weblogs.asp.net/scottgu/432854[^]

All you need can be found in .NET FCL. Please start here:
http://msdn.microsoft.com/en-us/library/system.net.mail.smtpclient%28v=vs.110%29.aspx[^],
http://msdn.microsoft.com/en-us/library/system.net.mail.mailmessage%28v=vs.110%29.aspx[^].

I hope your ASP.NET hosting provides you with the access to a SMTP server; I never heard of hosting packages without this feature.

Now, you need to pay special attention if you want to send mail based in input data taken from UI. It's way to easy to open up a vulnerability which would allow someone to turn you host system a spam-sending zombie, or something like that. You need to prevent it. Please see my past answer: unable to send mail , it showing the error in below code .[^].

—SA

Try this..

using System.Net;
using System.Net.Mail;

string to = strSidMail;
string from = "rajeeshmenoth@wordpress.com";
MailMessage message = new MailMessage(from, to);
message.Subject = txt_subject.text;
message.Body = mailbody;
message.BodyEncoding = Encoding.UTF8;
message.IsBodyHtml = true;
SmtpClient client = new SmtpClient("smtp.gmail.com", 587);
System.Net.NetworkCredential basicCredential1 = new
System.Net.NetworkCredential("yourgmail id", "Password");
client.EnableSsl = true;
client.UseDefaultCredentials = false;
client.Credentials = basicCredential1;
try
{
client.Send(message);
}
catch (Exception ex)
{
throw ex;
}