Question

I am using OpenPop.NET client to get access to my mailbox via Pop3 protocol. All is fine, except one thing: I cannot delete messages. Even sample from official site doesn’t help.
I’ve tried it with several mail servers: gmail.com, yandex.ru, rambler.ru situation is the same.

Update – added code.

static void Main(string[] args)
{
    DeleteMessageOnServer("pop.gmail.com", 995, true, USERNAME, PASSWORD, 1);
}

public static void
    DeleteMessageOnServer(string hostname, int port, bool useSsl, string username,
    string password, int messageNumber)
{
    // The client disconnects from the server when being disposed
    using (Pop3Client client = new Pop3Client())
    {
        // Connect to the server
        client.Connect(hostname, port, useSsl);

        // Authenticate ourselves towards the server
        client.Authenticate(username, password);

        // Mark the message as deleted
        // Notice that it is only MARKED as deleted
        // POP3 requires you to "commit" the changes
        // which is done by sending a QUIT command to the server
        // You can also reset all marked messages, by sending a RSET command.
        client.DeleteMessage(messageNumber);

        // When a QUIT command is sent to the server, the connection between them are closed.
        // When the client is disposed, the QUIT command will be sent to the server
        // just as if you had called the Disconnect method yourself.
    }
}

Answer 1

Deletion of the emails that are marked through the .DeleteMessage(messageNumber); method happens when the .Disconnect(); method is called.