The server rejected one or more recipient addresses
The server rejected one or more recipient addresses. The server response was: 550 5.7.1 Unable to relay for admin@erty.com
这句话表示什么出错???
my 原码:
MailMessage msg = new MailMessage();
msg.To = txtTo.Text;
msg.From = txtFrom.Text;
msg.Subject = txtSubject.Text;
msg.Body = txtContent.Value;
SmtpMail.SmtpServer=TextBox1.Text;
SmtpMail.Send(msg);
lblStatus.Text = "Sent email ok";
这个邮件服务器不需要smtp验证