Xojo Plugin Requires Chilkat v11.0.0+

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. Xojo Plugin

Dim success As Boolean
success = False

//  This example requires the Chilkat API to have been previously unlocked.
//  See Global Unlock Sample for sample code.

//  The mailman object is used for receiving (POP3) 
//  and sending (SMTP) email.
Dim mailman As New Chilkat.MailMan

//  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).
Dim sshHostname As String
sshHostname = "sftp.example.com"
Dim sshPort As Int32
sshPort = 22

//  Connect to an SSH server and establish the SSH tunnel:
success = mailman.SshOpenTunnel(sshHostname,sshPort)
If (success = False) Then
    System.DebugLog(mailman.LastErrorText)
    Return
End If

//  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("ssh_login","ssh_password")
If (success = False) Then
    System.DebugLog(mailman.LastErrorText)
    Return
End If

//  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.

//  The SSH tunnel may be kept open for any number of 
//  POP3 connections.  

//  Set the POP3 server's hostname
mailman.MailHost = "mail.my-pop3-server.com"

//  Set the POP3 settings for your POP3 server:
mailman.PopUsername = "pop3_login"
mailman.PopPassword = "pop3_password"
mailman.MailPort = 995
mailman.PopSsl = True

//  Connect to the POP3 server through the already-established SSH tunnel:
success = mailman.Pop3BeginSession()
If (success = False) Then
    System.DebugLog(mailman.LastErrorText)
    Return
End If

//  A visual inspection of the LastErrorText after
//  a successful POP3 connection will confirm the SSH tunneling.
//  Note: If the POP3 connection uses SSL/TLS, then the SSL/TLS 
//  secure channel will be wrapped within the SSH tunnel.
System.DebugLog(mailman.LastErrorText)

//  How many messages are in the POP3 inbox?
Dim numToDownload As Int32
numToDownload = mailman.GetMailboxCount()
If (numToDownload > 5) Then
    numToDownload = 5
End If

If (numToDownload = 0) Then
    System.DebugLog("No messages in the POP3 inbox.")
    Return
End If

//  Download a max of 5 messages
Dim i As Int32
Dim email As New Chilkat.Email
For i = 1 To numToDownload
    success = mailman.FetchOne(False,0,i,email)
    If (success = False) Then
        System.DebugLog(mailman.LastErrorText)
        Return
    End If

    System.DebugLog(email.From)
    System.DebugLog(email.Subject)
    System.DebugLog("----")
Next

//  Close the connection with the POP3 server, leaving the SSH tunnel open for subsequent POP3 connections.
success = mailman.Pop3EndSession()
If (success = False) Then
    System.DebugLog(mailman.LastErrorText)
    Return
End If

//  Try connecting to a different POP3 server through the same aleady setup SSH tunnel:
//  Set the POP3 server's hostname
mailman.MailHost = "mail.my-pop3-server2.com"

//  Set the POP3 settings for your POP3 server:
mailman.PopUsername = "pop3_login2"
mailman.PopPassword = "pop3_password2"
mailman.MailPort = 110
mailman.PopSsl = False

success = mailman.Pop3BeginSession()
If (success = False) Then
    System.DebugLog(mailman.LastErrorText)
    Return
End If

//  Review the LastErrorText to see that the connection was made via the SSH tunnel:
System.DebugLog(mailman.LastErrorText)

success = mailman.Pop3EndSession()
If (success = False) Then
    System.DebugLog(mailman.LastErrorText)
    Return
End If

//  Close the SSH tunnel.
success = mailman.SshCloseTunnel()
If (success = False) Then
    System.DebugLog(mailman.LastErrorText)
    Return
End If