PowerShell Requires Chilkat v11.0.0+

IMAP SSH Tunneling (Port Forwarding)

Demonstrates how to setup and use an SSH tunnel for IMAP. PowerShell

Add-Type -Path "C:\chilkat\ChilkatDotNet47-x64\ChilkatDotNet47.dll"

$success = $false

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

$imap = New-Object Chilkat.Imap

#  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.mysshserver.com"
$sshPort = 22

#  Connect to an SSH server and establish the SSH tunnel:
$success = $imap.SshOpenTunnel($sshHostname,$sshPort)
if ($success -eq $false) {
    $($imap.LastErrorText)
    exit
}

#  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 IMAP server, it is
#  for authenticating with the SSH server, which is separate.
$success = $imap.SshAuthenticatePw("mySshLogin","mySshPassword")
if ($success -eq $false) {
    $($imap.LastErrorText)
    exit
}

#  OK, the SSH tunnel is setup.  The IMAP component may
#  be used exactly the same as usual, except all communications
#  are sent through the SSH tunnel.

#  Connect to an IMAP server via the SSH tunnel.
#  Because the SSH tunnel has been previously setup,
#  this does not establish a direct connection with the IMAP
#  server.  It directs the SSH server to establish the connection.

#  In this example, the IMAP server requires SSL/TLS.  The TLS connection
#  will be enclosed within the SSH tunnel.
$imap.Ssl = $true
$imap.Port = 993
$success = $imap.Connect("imap.my-imap-server.com")
if ($success -eq $false) {
    $($imap.LastErrorText)
    exit
}

#  Authenticate with the IMAP server via the SSH tunnel.
$success = $imap.Login("myLogin","myPassword")
if ($success -eq $false) {
    $($imap.LastErrorText)
    exit
}

#  Select an IMAP mailbox
$success = $imap.SelectMailbox("Inbox")
if ($success -eq $false) {
    $($imap.LastErrorText)
    exit
}

#  How many messages in Inbox?
$msgCount = $imap.NumMessages
if ($msgCount -eq 0) {
    $("No messages found.")
    exit
}

$upperBound = 10
if ($msgCount -lt $upperBound) {
    $upperBound = $msgCount
}

#  Download up to the 1st 10 messages.
$email = New-Object Chilkat.Email

$bUid = $false
for ($i = 1; $i -le $upperBound; $i++) {

    $success = $imap.FetchEmail($false,$i,$bUid,$email)
    if ($success -eq $false) {
        $($imap.LastErrorText)
        exit
    }

    $($email.From)
    $($email.Subject)
    $("----")
}

#  Disconnect from the IMAP server.
#  The SSH tunnel remains open.
$success = $imap.Disconnect()
if ($success -eq $false) {
    $($imap.LastErrorText)
    exit
}

#  It is possible to re-use the existing SSH tunnel for the next connection:
$success = $imap.Connect("imap.my-imap-server2.com")
if ($success -eq $false) {
    $($imap.LastErrorText)
    exit
}

#  Review the LastErrorText to see that the connection was made via the SSH tunnel:
$($imap.LastErrorText)

$success = $imap.Disconnect()
if ($success -eq $false) {
    $($imap.LastErrorText)
    exit
}

#  Finally, close the SSH tunnel.
$success = $imap.SshCloseTunnel()
if ($success -eq $false) {
    $($imap.LastErrorText)
    exit
}

$("IMAP SSH tunneling example completed.")