Xojo Plugin

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.

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Xojo Plugin

Dim success As Boolean
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.

Dim mailman As New 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 = False) Then
    System.DebugLog(mailman.LastErrorText)
    Return
End If

//  Send a NOOP to keep the session alive.
success = mailman.Pop3Noop()
If (success = False) Then
    System.DebugLog(mailman.LastErrorText)
    Return
End If

System.DebugLog("POP3 NOOP succeeded.")