PowerShell

Send a Raw SMTP Command

Demonstrates the Chilkat MailMan.SmtpSendRawCommand method, which sends a raw command to the SMTP server and returns the server's response. The second argument specifies the charset to use if the command contains non-US-ASCII characters, and the third indicates whether to base64-encode the command before sending. This example sends a raw NOOP on an open connection.

Background: SMTP is a line-based text protocol (EHLO, MAIL FROM, RCPT TO, DATA, QUIT), so a raw-command hook lets you issue anything Chilkat doesn't wrap — a server extension, or a custom step during a manual auth exchange. The base64 flag exists because some SMTP exchanges (notably AUTH challenge/response) require the argument to be base64-encoded on the wire.

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

$success = $false

#  Demonstrates the MailMan.SmtpSendRawCommand method, which sends a raw command to the SMTP
#  server and returns the server's response.  The 2nd argument is the charset used if the
#  command contains non-US-ASCII characters, and the 3rd indicates whether to base64-encode
#  the command before sending.

$mailman = New-Object Chilkat.MailMan

#  Configure the SMTP server connection.
$mailman.SmtpHost = "smtp.example.com"
$mailman.SmtpPort = 465
$mailman.SmtpSsl = $true
$mailman.SmtpUsername = "user@example.com"
$mailman.SmtpPassword = "myPassword"

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

#  Send the raw SMTP NOOP command (not base64-encoded).
$response = $mailman.SmtpSendRawCommand("NOOP","us-ascii",$false)
if ($mailman.LastMethodSuccess -eq $false) {
    $($mailman.LastErrorText)
    exit
}

$("NOOP response: " + $response)

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