Python smtplib.SMTPConnectError() Examples

def send_message(mailfrom, rcptto, data):
    try:
        server = smtplib.SMTP(MX, 25, PHISH_MX)
        server.sendmail(mailfrom, rcptto, data)

    except smtplib.SMTPDataError as e:
        print '[-] {0}'.format(str(e[1]))

    except smtplib.SMTPServerDisconnected as e:
        print '[-] {0}'.format(str(e))

    except smtplib.SMTPConnectError as e:
        print '[-] {0}'.format(str(e[1])) 

def testFailingHELO(self):
        self.assertRaises(smtplib.SMTPConnectError, smtplib.SMTP,
                            HOST, self.port, 'localhost', 3) 

def validate_mx(server, domain):
    try:
        if server in MX_RECORD_CACHE:
            return MX_RECORD_CACHE[server]
        smtp = smtplib.SMTP(timeout=10)
        smtp.connect(server)
        status, _ = smtp.helo()
        if status != 250:
            smtp.quit()
            print("%s answer: %s - %s" % (server, status, _))
        smtp.mail('')
        status, _ = smtp.rcpt("invalid@"+domain)
        if status == 250:
            smtp.quit()
            MX_RECORD_CACHE[server] = True
            return True
        print("%s answer: %s - %s" % (server, status, _))
        smtp.quit()
    except smtplib.SMTPServerDisconnected as e:  # Server not permits verify user
        print("%s disconnected. [%s]" % (server, e))
    except smtplib.SMTPConnectError as e:
        print("Unable to connect to %s. [%s]" % (server, e))
    except socket.timeout as e:
        print("Timedout connecting to %s. [%s]" % (server, e))
    MX_RECORD_CACHE[server] = False
    return False        

# Lookup a domain and get its mailserver 

def testFailingHELO(self):
        self.assertRaises(smtplib.SMTPConnectError, smtplib.SMTP,
                            HOST, self.port, 'localhost', 3) 

def test_fallimento_connect(self, mock_smtp):
        """
        In caso di fallimento durante il connect il messaggio viene rimesso in coda
        """
        codici = (421,)
        for codice in codici:
            msg = 'code {}'.format(codice)
            instance = mock_smtp.return_value
            instance.sendmail.side_effect = smtplib.SMTPConnectError(code=codice, msg=msg)
            self._invia_msg_singolo()
            self.assertEqual(Messaggio.in_coda().count(), 1)
            self._reset_coda() 

def testFailingHELO(self):
        self.assertRaises(smtplib.SMTPConnectError, smtplib.SMTP,
                            HOST, self.port, 'localhost', 3) 

def testFailingHELO(self):
        self.assertRaises(smtplib.SMTPConnectError, smtplib.SMTP,
                            HOST, self.port, 'localhost', 3) 

def testFailingHELO(self):
        self.assertRaises(smtplib.SMTPConnectError, smtplib.SMTP,
                            HOST, self.port, 'localhost', 3) 

def testFailingHELO(self):
        self.assertRaises(smtplib.SMTPConnectError, smtplib.SMTP,
                            HOST, self.port, 'localhost', 3) 

def _send_smtp(message, subject, to, to_name, sender, sender_name):
    """SMTP implementation of sending email."""
    host = app.config.get('MAIL_HOST')

    if not host:
        raise MailFailure('SMTP Server Not Configured')

    try:
        server = smtplib.SMTP(host)
    except (smtplib.SMTPConnectError, socket.error) as ex:
        app.logger.error('Unable to send mail: %s', str(ex))
        raise MailFailure('Error connecting to SMTP server.')

    msg = text.MIMEText(message)
    msg['Subject'] = subject
    msg['To'] = email.utils.formataddr((to_name, to))
    msg['From'] = email.utils.formataddr((sender_name, sender))

    try:
        if app.debug:
            server.set_debuglevel(True)
        server.sendmail(sender, [to], msg.as_string())
    except (smtplib.SMTPException, socket.error) as ex:
        app.logger.error('Unable to send mail: %s', str(ex))
        raise MailFailure('Error sending mail to SMTP server.')
    finally:
        try:
            server.quit()
        except smtplib.SMTPException:
            pass 

def testFailingHELO(self):
        self.assertRaises(smtplib.SMTPConnectError, smtplib.SMTP,
                            HOST, self.port, 'localhost', 3) 

def testFailingHELO(self):
        self.assertRaises(smtplib.SMTPConnectError, smtplib.SMTP,
                            HOST, self.port, 'localhost', 3) 

def testFailingHELO(self):
        self.assertRaises(smtplib.SMTPConnectError, smtplib.SMTP,
                            HOST, self.port, 'localhost', 3) 

def testFailingHELO(self):
        self.assertRaises(smtplib.SMTPConnectError, smtplib.SMTP,
                            HOST, self.port, 'localhost', 3) 

def verify(self, email):
        """
        method that performs the verification on the passed
        email address.
        """
        lookup = {
            'address': None,
            'valid_format': False,
            'deliverable': False,
            'full_inbox': False,
            'host_exists': False,
            'catch_all': False,
        }
        try:
            lookup['address'] = self._parse_address(email)
            lookup['valid_format'] = True
        except EmailFormatError:
            lookup['address'] = f"{email}"
            return lookup
        
        # look for mx record and create a list of mail exchanges
        try:
            mx_record = resolver.query(lookup['address'].domain, 'MX')
            mail_exchangers = [exchange.to_text().split() for exchange in mx_record]
            lookup['host_exists'] = True
        except (resolver.NoAnswer, resolver.NXDOMAIN, resolver.NoNameservers):
            lookup['host_exists'] = False
            return lookup

        for exchange in mail_exchangers:
            try:
                host_exists, deliverable, catch_all = self._can_deliver(exchange, lookup['address'])
                if deliverable:
                    lookup['host_exists'] = host_exists
                    lookup['deliverable'] = deliverable
                    lookup['catch_all'] = catch_all
                    break
            except SMTPRecepientException as err:
                # Error handlers return a dict that is then merged with 'lookup'
                kwargs = handle_error.get(err.code, handle_unrecognised)(err.response)
                # This expression merges the lookup dict with kwargs
                lookup = {**lookup, **kwargs}

            except smtplib.SMTPServerDisconnected as err:
                lookup['message'] = "Internal Error"
            except smtplib.SMTPConnectError as err:
                lookup['message'] = "Internal Error. Maybe blacklisted"

        return lookup 

def send_sms(message_text, phone_number, carrier, from_address=None):
	"""
	Send an SMS message by emailing the carriers SMS gateway. This method
	requires no money however some networks are blocked by the carriers
	due to being flagged for spam which can cause issues.

	:param str message_text: The message to send.
	:param str phone_number: The phone number to send the SMS to.
	:param str carrier: The cellular carrier that the phone number belongs to.
	:param str from_address: The optional address to display in the 'from' field of the SMS.
	:return: This returns the status of the sent messsage.
	:rtype: bool
	"""
	from_address = (from_address or DEFAULT_FROM_ADDRESS)
	phone_number = phone_number.replace('-', '').replace(' ', '')
	# remove the country code for these 10-digit based
	match = re.match('1?(?P<phone_number>[0-9]{10})', phone_number)
	if match is None:
		raise ValueError('the phone number appears invalid')
	phone_number = match.group('phone_number')

	if len(message_text) > 160:
		raise ValueError('message length exceeds 160 characters')
	message = MIMEText(message_text)

	carrier_address = lookup_carrier_gateway(carrier)
	if not carrier_address:
		raise ValueError('unknown carrier specified')

	to_address = "{0}@{1}".format(phone_number, carrier_address)
	message['To'] = to_address
	message['From'] = from_address

	sms_gateways = get_smtp_servers(carrier_address)
	random.shuffle(sms_gateways)
	message_sent = False
	for sms_gateway in sms_gateways:
		try:
			smtp_connection = smtplib.SMTP(sms_gateway)
			smtp_connection.sendmail(from_address, [to_address], message.as_string())
			smtp_connection.quit()
		except (smtplib.SMTPConnectError, smtplib.SMTPDataError, smtplib.SMTPHeloError):
			continue
		message_sent = True
		break
	return message_sent 

def __init__(self,thread,starttime,opentrackurl,attach, sender , subject , message , *sendto ,**kwargs):


        al = Queue()

        smtp = kwargs['smtpt']
        mailhost = kwargs['mailhost']
        passwd = kwargs['passwd']
        port = kwargs['port']

        thr = int(thread)

        null = ""


        try:
            mail = smtplib.SMTP(smtp, port)
            mail.starttls()
            mail.login("{}".format(mailhost), '{}'.format(passwd))
            mail.quit()


            for i in range(thr):
                self.t = Thread(target=self.skeleton, args=(starttime,opentrackurl,attach,sender,message,subject, mailhost, passwd, smtp, int(port), al))
                self.t.daemon = True
                self.t.start()


            for mass in sendto:
                al.put(mass)

            al.join()

            os.startfile(os.getcwd() + '\\sleuth\\mailOpenList\\' + starttime + '.txt')

        except smtplib.SMTPAuthenticationError:
            print("Authentication Error", "Wrong Username or Password !", "Info")
            sys.stderr.flush()


        except smtplib.SMTPConnectError:
            print("Connection Error", "SMTP Server Down !", "Info")
            sys.stderr.flush()

        except smtplib.SMTPNotSupportedError:
            print("Support Error", "SMTP Not Supported !", "Info")
            sys.stderr.flush()

        except Exception as f:

            t, o, tb = sys.exc_info()
            print(f, tb.tb_lineno)
            sys.stderr.flush()

        #SendMail.skeleton(null,msg,mailhost,passwd,smtp,int(port),*sendto) 

def validate_email_address(email_to, email_from, debug=False):
    # find the appropiate mail server
    domain = email_to.split('@')[1]
    remote_server = get_mx_record(domain)

    if (remote_server is None):
        print("No valid email server could be found for [%s]!" % (email_to))
        return False

    # Login into the mail exchange server
    try:
        smtp = smtplib.SMTP()
        smtp.connect(remote_server)
        if debug:
            smtp.set_debuglevel(True)
    except smtplib.SMTPConnectError as e:
        print(e)
        return False
 
    try:
        smtp.ehlo_or_helo_if_needed()
    except Exception as e:
        print(e)
        return False
 
    # First Try to verify with VRFY
    # 250 is success code. 400 or greater is error.
    v_code, v_message = smtp.verify(email_to)
    if v_code and v_code != 250:
        f_code, f_message = smtp.mail(email_from)
        # Then use RCPT to verify
        if f_code and f_code == 250:
            r_code, r_message = smtp.rcpt(email_to)
            if r_code and r_code == 250:
                return True, r_message
            if r_code and r_code == 550:
                return False, r_message
        else:
            return False
    else:
        return True, v_message

    smtp.quit()
    return False