Sending email without keyfile (only certfile) using Python smtplib

Question

Trying to send email with a certificate file using the following script:

import smtplib

client = smtplib.SMTP(myhost, myport)
client.ehlo()
client.starttls(         


        

Answer 1

Here's a monkey-patch taken from this page:

class SMTPExt(smtplib.SMTP):
    """
    This class extends smtplib.SMTP and overrides the starttls method
    allowing extra parameters and forwarding them to ssl.wrap_socket.
    """

    def starttls(self, keyfile=None, certfile=None, **kwargs):
        self.ehlo_or_helo_if_needed()
        if not self.has_extn("starttls"):
            raise SMTPException("STARTTLS extension not supported by server.")
        (resp, reply) = self.docmd("STARTTLS")
        if resp == 220:
            self.sock = ssl.wrap_socket(self.sock, keyfile, certfile, **kwargs)
            self.file = SSLFakeFile(self.sock)
            # RFC 3207:
            # The client MUST discard any knowledge obtained from
            # the server, such as the list of SMTP service extensions,
            # which was not obtained from the TLS negotiation itself.
            self.helo_resp = None
            self.ehlo_resp = None
            self.esmtp_features = {}
            self.does_esmtp = 0
        return (resp, reply)

Using the root cert from requests