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SmtpClient::Host Property

Gets or sets the name or IP address of the host used for SMTP transactions.

Namespace:  System.Net.Mail
Assembly:  System (in System.dll)

public:
property String^ Host {
	String^ get ();
	void set (String^ value);
}

Property Value

Type: System::String
A String that contains the name or IP address of the computer to use for SMTP transactions.

ExceptionCondition
ArgumentNullException

The value specified for a set operation is nullptr.

ArgumentException

The value specified for a set operation is equal to String::Empty ("").

InvalidOperationException

You cannot change the value of this property when an email is being sent.

The value of the Host property can also be set using constructors or the application or machine configuration file. For more information, see <mailSettings> Element (Network Settings).

If information is specified using this property, this information overrides the configuration file settings.

The following code example demonstrates sending an e-mail message by using the host and port specified in an application configuration file.

static void CreateTestMessage4( String^ server )
{
   MailAddress^ from = gcnew MailAddress( L"ben@contoso.com" );
   MailAddress^ to = gcnew MailAddress( L"Jane@contoso.com" );
   MailMessage^ message = gcnew MailMessage( from,to );
   message->Subject = L"Using the SmtpClient class.";
   message->Body = L"Using this feature, you can send an e-mail message from an application very easily.";
   SmtpClient^ client = gcnew SmtpClient( server );
   Console::WriteLine( L"Sending an e-mail message to {0} by using SMTP host {1} port {2}.", to, client->Host, client->Port );
   client->Send( message );
   client->~SmtpClient();
}
public:
    static void CreateTestMessage4(String* server)
    {
       MailAddress* from = new MailAddress(S"ben@contoso.com");
       MailAddress* to = new MailAddress(S"Jane@contoso.com");
       MailMessage* message = new MailMessage(from, to);
        message->Subject = S"Using the SmtpClient class.";
        message->Body = S"Using this feature, you can send an e-mail message from an application very easily.";
        SmtpClient* client = new SmtpClient(server);
        Console::WriteLine(S"Sending an e-mail message to {0} by using SMTP host {1} port {2}.", 
             to, client->Host, __box(client->Port));
        client->Send(message);
        client->Dispose();
    }

Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98

The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

.NET Framework

Supported in: 3.5, 3.0, 2.0

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