C# 使用System.Net.Mail发邮件,如何捕捉油箱地址不正确时,显示失败

[alex_peib]

各位:
我在C#中使用System.Net.Mail发邮件,当收件人邮箱地址不正确时,我使用Send发送时,怎么捕捉到发送失败的信息.谢谢指点!

[fenglaijun]

            try
            {
                System.Net.Mail.MailAddress from = new System.Net.Mail.MailAddress("from126");
                System.Net.Mail.MailAddress to = new System.Net.Mail.MailAddress("to126");
                System.Net.Mail.MailMessage message = new System.Net.Mail.MailMessage(from, to);
                message.Body = "This mail send from C# application";
            }
            catch (FormatException)
            {
                MessageBox.Show("电子邮件格式不符合要求！");
            }

[alex_peib]

楼主,象你这样在用send方法发送时,邮箱地址不正确,程序也不走catch这里

[fenglaijun]

我不是楼主。
你的意思是地址格式正确但是这个地址不存在或者其他？

[fenglaijun]

            //现在可以了邮件地址格式错误抛出FormatExectpion
            //发送失败抛出SmtpExecption
            try
            {
                System.Net.Mail.MailAddress from = new System.Net.Mail.MailAddress("[e-mail]");
                System.Net.Mail.MailAddress to = new System.Net.Mail.MailAddress("[e-mail]");
                System.Net.Mail.MailMessage message = new System.Net.Mail.MailMessage(from, to);
                message.Body = "This mail send from C# application";

                System.Net.Mail.SmtpClient client = new System.Net.Mail.SmtpClient();
                client.Host = "http://www.126.com";
                client.Send(message);
            }
            catch (FormatException)
            {
                MessageBox.Show("电子邮件格式不符合要求！");
            }
            catch (System.Net.Mail.SmtpException)
            {
                MessageBox.Show("邮件发送失败！");

            }

[龙宜坡]

C# 使用System.Net.Mail发邮件,如何捕捉油箱地址不正确时,显示失败

[zhangjianliang01]

验证输入的正确性

public static bool isEmail( string inputEmail )
{
    inputEmail = NulltoString( inputEmail );
    string strRegex = @"^( [a-zA-Z0-9_\-\.]+ )@( ( \[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\. )|( ( [a-zA-Z0-9\-]+\. )+ ) )( [a-zA-Z]{2,4}|[0-9]{1,3} )( \]? )$";
    Regex re = new Regex( strRegex );
    if ( re.IsMatch( inputEmail ) )
    return ( true );
    else
    return ( false );
}

验证邮件地址的正确性：

string[] host = ( address.Split( @ ) );
string hostname = host[1];

IPHostEntry IPhst = Dns.Resolve( hostname );
IPEndPoint endPt = new IPEndPoint( IPhst.AddressList[0], 25 );
Socket s= new Socket( endPt.AddressFamily, SocketType.Stream,ProtocolType.Tcp );
s.Connect( endPt );

//Attempting to connect
if( !Check_Response( s, SMTPResponse.CONNECT_SUCCESS ) )
{ 
    s.Close( );
    return false;
}

//HELO server
Senddata( s, string.Format( "HELO {0}\r\n", Dns.GetHostName( )) );
if( !Check_Response( s, SMTPResponse.GENERIC_SUCCESS ) )
{
    s.Close( );
    return false;
}

//Identify yourself
//Servers may resolve your domain and check whether you are listed in BlackLists etc.
Senddata( s, string.Format( "MAIL From: {0}\r\n","[e-mail]" ) );
if( !Check_Response( s, SMTPResponse.GENERIC_SUCCESS ) )
{
    
    s.Close( );
    return false;
}

//Attempt Delivery ( I can use VRFY, but most SMTP servers only disable it for security reasons )
Senddata( s, address );
if( !Check_Response( s, SMTPResponse.GENERIC_SUCCESS ) )
{
    
    s.Close( );
    return false;
}
return ( true );