This documentation is archived and is not being maintained.

MailMessage.Headers Property

Gets the e-mail headers that are transmitted with this e-mail message.

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

public NameValueCollection Headers { get; }
/** @property */
public NameValueCollection get_Headers ()

public function get Headers () : NameValueCollection

Not applicable.

Property Value

A NameValueCollection that contains the e-mail headers.

The following code example demonstrates displaying the headers for a mail message.

public static void CreateMessageWithAttachment4(string server, string to)
{
    // Specify the file to be attached and sent.
    // This example uses a file on a UNC share.
    string file = @"\\share3\c$\reports\data.xls";
    // Create a message and set up the recipients.
    MailMessage message = new MailMessage(
       "ReportMailer@contoso.com",
       to,
       "Quarterly data report",
       "See the attached spreadsheet.");

    // Create  the file attachment for this e-mail message.
    Attachment data = new Attachment("qtr3.xls", MediaTypeNames.Application.Octet);
    // Add time stamp information for the file.
    ContentDisposition disposition = data.ContentDisposition;
    disposition.CreationDate = System.IO.File.GetCreationTime(file);
    disposition.ModificationDate = System.IO.File.GetLastWriteTime(file);
    disposition.ReadDate = System.IO.File.GetLastAccessTime(file);
    disposition.DispositionType = DispositionTypeNames.Attachment;
    // Add the file attachment to this e-mail message.
    message.Attachments.Add(data);
    //Send the message.
    SmtpClient client = new SmtpClient(server);
    // Add credentials if the SMTP server requires them.
    client.Credentials = (ICredentialsByHost)CredentialCache.DefaultNetworkCredentials;
    client.Send(message);
    // Display the message headers.
    string[] keys = message.Headers.AllKeys;
    Console.WriteLine("Headers");
    foreach (string s in keys)
    {
        Console.WriteLine("{0}:", s);
        Console.WriteLine("    {0}", message.Headers[s]);
    }
    data.Dispose();
}

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

The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework

Supported in: 3.0, 2.0
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