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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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LOCAL nSuccess
LOCAL oMailman

nSuccess := 0

//  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.

oMailman := CreateObject("Chilkat.MailMan")

//  Configure the POP3 server connection.
oMailman:MailHost := "pop.example.com"
oMailman:MailPort := 995
oMailman:PopSsl := 1
oMailman:PopUsername := "user@example.com"
oMailman:PopPassword := "myPassword"

//  Begin a POP3 session.

nSuccess := oMailman:Pop3BeginSession()
IF (nSuccess == 0)
    ? oMailman:LastErrorText
    oMailman:destroy()
    RETURN
ENDIF

//  Send a NOOP to keep the session alive.
nSuccess := oMailman:Pop3Noop()
IF (nSuccess == 0)
    ? oMailman:LastErrorText
    oMailman:destroy()
    RETURN
ENDIF

? "POP3 NOOP succeeded."

oMailman:destroy()