Для отправки Gmail через SMTP в ASP.NET используйте
var smtp = new SmtpClient
{
Host = "smtp.gmail.com",
Port = 587,
EnableSsl = true,
DeliveryMethod = SmtpDeliveryMethod.Network,
UseDefaultCredentials = false,
Credentials = new NetworkCredential("turkishcorpus1@gmail.com", "my password")
};
using (var message = new MailMessage("turkishcorpus1@gmail.com", "oruc_esma@hotmail.com")
{
Subject = "This is the title of the mail",
Body = "This is the body"
//,IsBodyHtml = true //optional
})
{
smtp.Send(message);
}