PowerShell

Send a POP3 NOOP Command

Demonstrates the Chilkat MailMan.Pop3Noop method, which sends a POP3 NOOP command to the server. NOOP does nothing except elicit a positive response, which is useful for keeping a session alive or verifying the connection is still responsive. This example begins a POP3 session and sends a NOOP.

Background: NOOP ("no operation") is a standard keep-alive across many internet protocols. Servers often drop idle connections after a timeout; sending a periodic NOOP resets that timer so a long-running session stays open. It also serves as a cheap "are you still there?" probe — a successful reply confirms the socket and the authenticated session are still healthy.

Chilkat PowerShell Downloads

Download Chilkat for PowerShell

PowerShell

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

$success = $false

#  Demonstrates the MailMan.Pop3Noop method, which sends a POP3 NOOP command to the server.
#  NOOP does nothing except elicit a positive response, which is useful for keeping a
#  session alive or verifying the connection is still responsive.

$mailman = New-Object Chilkat.MailMan

#  Configure the POP3 server connection.
$mailman.MailHost = "pop.example.com"
$mailman.MailPort = 995
$mailman.PopSsl = $true
$mailman.PopUsername = "user@example.com"
$mailman.PopPassword = "myPassword"

#  Begin a POP3 session.

$success = $mailman.Pop3BeginSession()
if ($success -eq $false) {
    $($mailman.LastErrorText)
    exit
}

#  Send a NOOP to keep the session alive.
$success = $mailman.Pop3Noop()
if ($success -eq $false) {
    $($mailman.LastErrorText)
    exit
}

$("POP3 NOOP succeeded.")