如何实现发信时验证邮箱用户和密码
发信服务器要验证用户名和密码，使用System.Net.Mail空间在网页里面要怎么样才能把我的用户名和密码等验证信息给加到里面去呢？
有些服务器限制不严格的话，不用验证发信的用户名和密码就能把信给发过去，就像下面的代码一样
protected void Button1_Click(object sender, EventArgs e)
{
MailAddress from = new MailAddress("aaa@aaa.com");
MailAddress to = new MailAddress("www.summoner@163.com");
MailMessage message = new MailMessage(from, to);
message.Subject = "Test mail";
message.Body = "Using this feature, you can send an e-mail message from an application very easily.";
SmtpClient client = new SmtpClient("mail.sys-sh.com",25);
client.Send(message);
this.Button1.Text = "OK";
}
但是有些服务器限制比较严格，需要发件人给出邮箱用户名和密码，就像先登录邮箱网站输入用户名和密码一样，现在我想在按钮单击事件里面给加上用户名和密码的验证信息，要怎么样加？
{
MailAddress from = new MailAddress("aaa@aaa.com");
MailAddress to = new MailAddress("www.summoner@163.com");
MailMessage message = new MailMessage(from, to);
message.Subject = "Test mail";
message.Body = "Using this feature, you can send an e-mail message from an application very easily.";
SmtpClient client = new SmtpClient("mail.sys-sh.com",25);
client.Send(message);
this.Button1.Text = "OK";
}
