CkPython

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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import sys
import chilkat

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 = chilkat.CkMailMan()

#  Configure the SMTP server connection.
mailman.put_SmtpHost("smtp.example.com")
mailman.put_SmtpPort(465)
mailman.put_SmtpSsl(True)
mailman.put_SmtpUsername("user@example.com")
mailman.put_SmtpPassword("myPassword")

success = mailman.OpenSmtpConnection()
if (success == False):
    print(mailman.lastErrorText())
    sys.exit()

#  Send the raw SMTP NOOP command (not base64-encoded).
response = mailman.smtpSendRawCommand("NOOP","us-ascii",False)
if (mailman.get_LastMethodSuccess() == False):
    print(mailman.lastErrorText())
    sys.exit()

print("NOOP response: " + response)

success = mailman.CloseSmtpConnection()
if (success == False):
    print(mailman.lastErrorText())
    sys.exit()