Lianja

Send an SMTP NOOP Command

Demonstrates the Chilkat MailMan.SmtpNoop method, which sends an SMTP NOOP command to the server. NOOP does nothing except elicit a positive response, which is useful for keeping a connection alive or verifying it is still responsive. This example opens an SMTP connection, sends a NOOP, and closes.

Background: When holding an SMTP connection open across many sends (see OpenSmtpConnection), an idle stretch can cause the server to time out and drop the socket. A periodic NOOP keeps the session active and confirms the server is still responding, so the next SendEmail doesn't fail on a silently-closed connection.

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llSuccess = .F.

//  Demonstrates the MailMan.SmtpNoop method, which sends an SMTP NOOP command to the server.
//  NOOP does nothing except elicit a positive response, useful for keeping a connection
//  alive or verifying it is still responsive.

loMailman = createobject("CkMailMan")

//  Configure the SMTP server connection.
loMailman.SmtpHost = "smtp.example.com"
loMailman.SmtpPort = 465
loMailman.SmtpSsl = .T.
loMailman.SmtpUsername = "user@example.com"
loMailman.SmtpPassword = "myPassword"

//  Open the SMTP connection.

llSuccess = loMailman.OpenSmtpConnection()
if (llSuccess = .F.) then
    ? loMailman.LastErrorText
    release loMailman
    return
endif

//  Send a NOOP to keep the connection alive.
llSuccess = loMailman.SmtpNoop()
if (llSuccess = .F.) then
    ? loMailman.LastErrorText
    release loMailman
    return
endif

llSuccess = loMailman.CloseSmtpConnection()
if (llSuccess = .F.) then
    ? loMailman.LastErrorText
    release loMailman
    return
endif

? "SMTP NOOP succeeded."


release loMailman