I solved, I hope that this aswer helps somebody, this the code is here:
public ResponseDto sendEmail(EmailDto emailDto) {
try
{
MailMessage message = new MailMessage();
SmtpClient client = new SmtpClient();
message.From = new MailAddress("mail@gmail.com");
message.Subject = "have a new mail";
message.Body = "info: \n "
+ "name: " + emailDto.Name
+ "\mail: "+ emailDto.Email + "\nMessage: " +
emailDto.Message;
message.To.Add("mail@hotmail.com");
client.EnableSsl = false;
client.UseDefaultCredentials = false;
client.Port = 25;
client.Host = "relay-hosting.secureserver.net";
client.Send(message);
}
catch (Exception e) {
return new ResponseDto
{
message = e.ToString()
,
Success = false
};
}
return new ResponseDto
{
message = "success",
Success = true
};
}
the problem was that other relay/smtp servers will not work from our hosting. and i don't need specify the password. and i change the port and the host, this is the link that help me
https://au.godaddy.com/community/Developer-Cloud-Portal/Unable-to-send-email-from-C-net-application-from-website/td-p/2394
