POP3 SSH Tunneling (Port Forwarding)

Demonstrates how to connect to a POP3 server through an SSH tunnel. Reads a POP3 mailbox and display the FROM and SUBJECT header fields of each email.

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//  The mailman object is used for receiving (POP3)
//  and sending (SMTP) email.
Chilkat.MailMan mailman = new Chilkat.MailMan();

//  Any string argument automatically begins the 30-day trial.
bool success;
success = mailman.UnlockComponent("30-day trial");
if (success != true) {
    MessageBox.Show("Component unlock failed");
    return;
}

//  Connect to an SSH server and establish the SSH tunnel:
string sshHostname;
int sshPort;
bool bForSmtp;
//  The SSH hostname may be a hostname or an
//  IP address, such as "192.168.1.108".
//  The port is typically 22 (the standard port for SSH).
sshHostname = "www.my-ssh-server.com";
sshPort = 22;
//  Select POP3 by setting the following variable to false
bForSmtp = false;
//  The 1st argument passed to SshTunnel indicates whether
//  a tunnel for SMTP or POP3 is being established.
success = mailman.SshTunnel(bForSmtp,sshHostname,sshPort);
if (success != true) {
    MessageBox.Show(mailman.LastErrorText);
    return;
}

//  Authenticate with the SSH server via a login/password
//  or with a public key.
//  This example demonstrates SSH password authentication.
//  Note: This is not authenticating with the POP3 server, it is
//  for authenticating with the SSH server, which is separate.
success = mailman.SshAuthenticatePw(bForSmtp,"ssh_login","ssh_password");
if (success != true) {
    MessageBox.Show(mailman.LastErrorText);
    return;
}

//  OK, the SSH tunnel is setup.  The mailman may
//  be used exactly the same as usual, except all communications
//  are now sent through the SSH tunnel.

//  Set the POP3 server's hostname
mailman.MailHost = "mail.chilkatsoft.com";

//  Set the POP3 login/password.
mailman.PopUsername = "pop3_login";
mailman.PopPassword = "pop3_password";

//  Download a max of 5 messages
//  To download all email, leave MaxCount unset so it remains at the default value of 0.
mailman.MaxCount = 5;

Chilkat.EmailBundle bundle = null;
//  Copy the all email from the user's POP3 mailbox
//  into a bundle object.  The email remains on the server.
bundle = mailman.CopyMail();

//  If you're curious, have a look at LastErrorText after
//  a successful send.  You'll see detailed information that
//  confirms the SSH tunneling.
MessageBox.Show(mailman.LastErrorText);

if (bundle == null ) {
    MessageBox.Show(mailman.LastErrorText);
    return;
}

int i;
Chilkat.Email email = null;
for (i = 0; i <= bundle.MessageCount - 1; i++) {
    email = bundle.GetEmail(i);
    textBox1.Text += email.From + "\r\n";
    textBox1.Text += email.Subject + "\r\n" + "\r\n";

}

//  Close the connection (with both SSH server and POP3 server)
mailman.Pop3EndSession();