sending mail asp.net

Basically, you put the data you need in the Web form and use HTTP request method "post". On server side, you gather the requested data, make a e-mail message our of it and send it using some mail agent (most typically, using SMTP).

First of all, please see:
http://msdn.microsoft.com/en-us/library/system.net.mail.smtpclient%28v=vs.90%29.aspx[^]
http://msdn.microsoft.com/en-us/library/system.net.mail.aspx[^].

See also:
Please see:
http://www.asp.net/web-forms/videos/how-do-i/how-do-i-use-aspnet-to-send-email-from-a-web-site[^],
http://forums.asp.net/t/1726545.aspx/1[^].

This topic is too popular. With CodeProject along, you can find plenty of relevant information and code samples:
unable to send mail , it showing the error in below code .[^].

I need to warn you about security in your approach. This is really serious. Please see my past answer:
unable to send mail , it showing the error in below code .[^].

—SA

try this,

MailAddress mailfrom = new MailAddress ( "frommail@gmail.com" );
MailAddress mailto = new MailAddress ( "tomail@gmail.com" );
MailMessage newmsg = new MailMessage ( mailfrom, mailto );

newmsg.Subject = "Subject of Email";
newmsg.Body = "Body(message) of email";

////For File Attachment, more file can also be attached

//Attachment att = new Attachment ( "G:\\code.txt" );
//newmsg.Attachments.Add ( att );

SmtpClient smtps = new SmtpClient ( "smtp.gmail.com", 587 );
smtps.UseDefaultCredentials = false;
smtps.Credentials = new NetworkCredential ( "urmail@gmail.com", "urpwd" );
smtps.EnableSsl = true;
smtps.Send ( newmsg );

Have a look :

string configMailID = "aa@abc.com";
string ContactMailID = "bb@abc.com";
 string subject ="Hello";
string mailBody = "HI";
int mailSent = SendMailThroughOutlook(configMailID,ContactMailID,subject,mailBody);


public int SendMailThroughOutlook(string mailFrom,string mailTO,string mailSubject,string mailBody)
        {
            int isMailSent = 0;
            MailMessage message = new MailMessage();           
            try
            {
                message.From = new MailAddress(mailFrom);
                string[] AdminIds = mailTO.Split(',');
                for (int i = 0; i < AdminIds.Length; i++)
                {
                    message.To.Add(new MailAddress(AdminIds[i]));
                }
                if (mailCC.Trim().Length != 0)
                    message.CC.Add(mailCC);

                message.Subject = mailSubject;
                message.Body = mailBody;
                message.IsBodyHtml = true;
                SmtpClient client = new SmtpClient("abc.com", 25);
                
                client.DeliveryMethod = SmtpDeliveryMethod.Network;
                Exception ex = new Exception();
                client.Send(message);
                isMailSent = 1;
          
            }
            catch (Exception ex)
            {
                isMailSent = 0;
              
            }
            finally
            {
                message.Dispose();
            }
            return isMailSent;

Hi,
Your Solution:

how to use smpt server to send mail in tell a friend[^]

Please refer following url,

Send mail using Google Apps[^]

Hope this may help you...