AutoIt

Open a Persistent SMTP Connection

Demonstrates the Chilkat MailMan.OpenSmtpConnection method, which explicitly opens a connection to the SMTP server and authenticates if a username and password, OAuth2 token, or other applicable settings have been provided. This example opens the connection, notes where sending would occur, and closes it.

Background: By default, sending a single email opens a connection, sends, and closes it. When sending many messages, that per-message overhead adds up. Explicitly calling OpenSmtpConnection once, sending in a loop, then CloseSmtpConnection keeps a single authenticated session open for the whole batch — substantially faster and gentler on the server than reconnecting each time.

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Local $bSuccess = False

;  Demonstrates the MailMan.OpenSmtpConnection method, which explicitly opens a connection
;  to the SMTP server and authenticates if credentials (or an OAuth2 token) have been
;  provided.

$oMailman = ObjCreate("Chilkat.MailMan")

;  Configure the SMTP server connection.
$oMailman.SmtpHost = "smtp.example.com"
$oMailman.SmtpPort = 465
$oMailman.SmtpSsl = True
$oMailman.SmtpUsername = "user@example.com"
$oMailman.SmtpPassword = "myPassword"

;  Explicitly open (and authenticate) the SMTP connection.

$bSuccess = $oMailman.OpenSmtpConnection()
If ($bSuccess = False) Then
    ConsoleWrite($oMailman.LastErrorText & @CRLF)
    Exit
EndIf

ConsoleWrite("SMTP connection opened." & @CRLF)

;  ... send one or more emails here ...

;  Close the connection when done.
$bSuccess = $oMailman.CloseSmtpConnection()
If ($bSuccess = False) Then
    ConsoleWrite($oMailman.LastErrorText & @CRLF)
    Exit
EndIf