在C＃中检查有效的电子邮件地址 [英] Check Valid email address in c#

问题描述

我正在使用c＃Windows应用程序中的smtp服务发送电子邮件。我必须以最佳方式执行以降低电子邮件跳出率。我必须检查所提供的电子邮件地址是否有效。我正在使用代码。

I'm sending email using smtp services in my c# windows application. I have to perform in a best way to reduce the email bounce rate. I have to check the provided email address is valid or not. I'm using the code.

    private void btnCheckValid_Click(object sender, EventArgs e)
        {
            if (isRealDomain(textBox1.Text.Trim()) == true)
                MessageBox.Show("Valid Email Address!");
        }
        private bool isRealDomain(string inputEmail)
        {
            bool isReal = false;
            try
            {
                string[] host = (inputEmail.Split('@'));
                string hostname = host[1];

                IPHostEntry IPhst = Dns.GetHostEntry(hostname);
                IPEndPoint endPt = new IPEndPoint(IPhst.AddressList[0], 25);
                Socket s = new Socket(endPt.AddressFamily,
                        SocketType.Stream, ProtocolType.Tcp);
                s.Connect(endPt);
                s.Close();
                isReal = true;
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);
                isReal = false;
            }

            return isReal;
        }

通过检查真实域，我可以识别托管IP，但是电子邮件地址是

By checking the real domain I can identified the Hosted IP but the email address is created on the host or not.

所以我只能验证格式。

我的问题是如何在c＃中仅查找任何域的有效地址。

So my question is how to find only valid address of any domain in c#.

推荐答案

您可以导入 System.ComponentModel.DataAnnotations 并将其用于这样：

You can import System.ComponentModel.DataAnnotations and use it in this way:

private bool validMail(string address)
{
    EmailAddressAttribute e = new EmailAddressAttribute();
    if (e.IsValid(address))
        return true;
    else
        return false;
}

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