DownloadMessageHeaders Method

public long DownloadMessageHeaders(
   int messageInboxIndex, 
   Stream output
)

Public Function DownloadMessageHeaders( _
   ByVal messageInboxIndex As Integer,  _
   ByVal output As Stream _
) As Long

public:
  long DownloadMessageHeaders(
   int messageInboxIndex, 
   Stream^ output
);

Parameters

messageInboxIndex

The ordinal position of the message in the inbox. It must be in the range from 1 to MessageCount.

output

Stream that will receive the message.

Return Value

Shows how to connect to a POP3 server and download headers of a message.

using System;
using System.IO;
using ComponentPro.Net;
using ComponentPro.Net.Mail;

...

const string serverName = "myserver";
const string user = "name@domain.com";
const string password = "password";
const int port = 995;
const SslSecurityMode securityMode = SslSecurityMode.Implicit;

Pop3 client = new Pop3();
try
{
    Console.WriteLine("Connecting POP3 server: {0}:{1}...", serverName, port);
    // Connect to the server. 
    client.Connect(serverName, port, securityMode);

    // Login to the server. 
    Console.WriteLine("Logging in as {0}...", user);
    client.Authenticate(user, password);

    // Get mailbox info. 
    Pop3MailboxStat info = client.GetMailboxStat();

    // Show the number of messages in the selected folder. 
    Console.WriteLine("{0} messages found.", info.MessageCount);


    // Get the message list. 
    Console.WriteLine("Getting message list...");
    Pop3MessageCollection list = client.ListMessages(Pop3EnvelopeParts.FullHeaders);

    Pop3Message message;
    for (int i = 0; i < list.Count; i++)
    {
        message = list[i];

        // Print out message uniqueid and sequence id     
        Console.WriteLine("UniqueId: {0}, Sequence Num: {1}", message.UniqueId, message.MessageInboxIndex);
        Console.WriteLine("From: {0}, To: {1}, Subject: '{2}'", message.From, message.To, message.Subject);
        Console.WriteLine();
    }



    // Get the message list. 
    Console.WriteLine("Getting message list...");
    list = client.ListMessages(Pop3EnvelopeParts.MessageInboxIndex);

    for (int i = 0; i < list.Count; i++)
    {
        message = list[i];

        // Download message headers to a stream. 
        Stream s = new MemoryStream();
        client.DownloadMessageHeaders(message.MessageInboxIndex, s);

        // Load message from the Stream object. 
        MailMessage msg = new MailMessage(s);

        // Print out message uniqueid and sequence id     
        Console.WriteLine("Inbox Index: {0}", message.MessageInboxIndex);
        Console.WriteLine("From: {0}, To: {1}, Subject: '{2}'", msg.From, msg.To, msg.Subject);
        Console.WriteLine();
    }


    // Disconnect. 
    Console.WriteLine("Disconnecting...");
    client.Disconnect();

}
catch (Pop3Exception pop3Exc)
{
    Console.WriteLine(string.Format("An POP3 error occurred: {0}, ErrorStatus: {1}", pop3Exc.Message, pop3Exc.Status));
}
catch (Exception exc)
{
    Console.WriteLine(string.Format("An error occurred: {0}", exc.Message));
}

Imports System.IO
Imports ComponentPro.Net
Imports ComponentPro.Net.Mail

...

Const serverName As String = "myserver" 
Const user As String = "name@domain.com" 
Const password As String = "password" 
Const port As Integer = 995
Const securityMode As SslSecurityMode = SslSecurityMode.Implicit

Dim client As New Pop3()
Try 
    Console.WriteLine("Connecting POP3 server: {0}:{1}...", serverName, port)
    ' Connect to the server. 
    client.Connect(serverName, port, securityMode)

    ' Login to the server. 
    Console.WriteLine("Logging in as {0}...", user)
    client.Authenticate(user, password)

    ' Get mailbox info. 
    Dim info As Pop3MailboxStat = client.GetMailboxStat()

    ' Show the number of messages in the selected folder. 
    Console.WriteLine("{0} messages found.", info.MessageCount)


    ' Get the message list. 
    Console.WriteLine("Getting message list...")
    Dim list As Pop3MessageCollection = client.ListMessages(Pop3EnvelopeParts.FullHeaders)

    Dim message As Pop3Message
    For i As Integer = 0 To list.Count - 1
        message = list(i)

        ' Print out message uniqueid and sequence id     
        Console.WriteLine("UniqueId: {0}, Sequence Num: {1}", message.UniqueId, message.MessageInboxIndex)
        Console.WriteLine("From: {0}, To: {1}, Subject: '{2}'", message.From, message.To, message.Subject)
        Console.WriteLine()
    Next i



    ' Get the message list. 
    Console.WriteLine("Getting message list...")
    list = client.ListMessages(Pop3EnvelopeParts.MessageInboxIndex)

    For i As Integer = 0 To list.Count - 1
        message = list(i)

        ' Download message headers to a stream. 
        Dim s As Stream = New MemoryStream()
        client.DownloadMessageHeaders(message.MessageInboxIndex, s)

        ' Load message from the Stream object. 
        Dim msg As New MailMessage(s)

        ' Print out message uniqueid and sequence id     
        Console.WriteLine("Inbox Index: {0}", message.MessageInboxIndex)
        Console.WriteLine("From: {0}, To: {1}, Subject: '{2}'", msg.From, msg.To, msg.Subject)
        Console.WriteLine()
    Next i


    ' Disconnect. 
    Console.WriteLine("Disconnecting...")
    client.Disconnect()

Catch pop3Exc As Pop3Exception
    Console.WriteLine(String.Format("An POP3 error occurred: {0}, ErrorStatus: {1}", pop3Exc.Message, pop3Exc.Status))
Catch exc As Exception
    Console.WriteLine(String.Format("An error occurred: {0}", exc.Message))
End Try

Reference