No puedo enviar un correo electrónico usando SMTP de Gmail, esto es lo que recibo cuandoprint_r el objeto.

Estoy usando las mismas credenciales de gmail para Nombre de usuario y Contraseña de los atributos de phpMailer, así que estoy seguro de que mis credenciales son correctas, pero no tengo idea de por qué no se envía.

Gracias, agradezco cualquier apoyo.

EMailer Object
(
    [pathViews:protected] => application.views.email
    [pathLayouts:protected] => application.views.email.layouts
    [_myMailer:EMailer:private] => PHPMailer Object
        (
            [Priority] => 3
            [CharSet] => UTF-8
            [ContentType] => text/html
            [Encoding] => 8bit
            [ErrorInfo] => SMTP Error: Could not authenticate.
            [From] => [email protected]
            [FromName] => Qelasy Administrator
            [Sender] => 
            [Subject] => Qelasy Security PIN
            [Body] => Dear Parent,<br /><br />You have successfully registered for Qelasy Security System.<br /><br />Please use this PIN to activate your tablet: <b>34123</b>.<br /><br />Thank you for registering with Qelasy Security System.<br /><br />We value your participation.<br /><br />If you have any questions please call +33 6 9881 1914 or email us at [email protected].<br /><br />Thank You,<br />Qelasy Security Team
            [AltBody] => 
            [WordWrap] => 0
            [Mailer] => smtp
            [Sendmail] => /usr/sbin/sendmail
            [PluginDir] => 
            [ConfirmReadingTo] => 
            [Hostname] => 
            [MessageID] => 
            [Host] => smtp.gmail.com
            [Port] => 465
            [Helo] => 
            [SMTPSecure] => ssl
            [SMTPAuth] => 1
            [Username] => [email protected]
            [Password] => ********
            [Timeout] => 10
            [SMTPDebug] => 
            [SMTPKeepAlive] => 
            [SingleTo] => 
            [LE] => 

            [smtp:PHPMailer:private] => SMTP Object
                (
                    [SMTP_PORT] => 25
                    [CRLF] => 

                    [do_debug] => 
                    [do_verp] => 
                    [smtp_conn:SMTP:private] => Resource id #86
                    [error:SMTP:private] => 
                    [helo_rply:SMTP:private] => 250-mx.google.com at your service, [220.247.236.99]
250-SIZE 35882577
250-8BITMIME
250-AUTH LOGIN PLAIN XOAUTH XOAUTH2 PLAIN-CLIENTTOKEN
250-ENHANCEDSTATUSCODES
250-CHUNKING
250 SMTPUTF8

                )

            [to:PHPMailer:private] => Array
                (
                    [0] => Array
                        (
                            [0] => [email protected]
                            [1] => 
                        )

                )

            [cc:PHPMailer:private] => Array
                (
                    [0] => Array
                        (
                            [0] => [email protected]
                            [1] => Yohan Hirimuthugoda
                        )

                    [1] => Array
                        (
                            [0] => [email protected]
                            [1] => Azraar Azward
                        )

                )

            [bcc:PHPMailer:private] => Array
                (
                )

            [ReplyTo:PHPMailer:private] => Array
                (
                    [[email protected]] => Array
                        (
                            [0] => [email protected]
                            [1] => 
                        )

                )

            [all_recipients:PHPMailer:private] => Array
                (
                    [[email protected]] => 1
                    [[email protected]] => 1
                    [[email protected]] => 1
                )

            [attachment:PHPMailer:private] => Array
                (
                )

            [CustomHeader:PHPMailer:private] => Array
                (
                    [0] => Array
                        (
                            [0] => Cc
                            [1] =>  Yohan Hirimuthugoda <[email protected]>
                        )

                    [1] => Array
                        (
                            [0] => Cc
                            [1] =>  Azraar Azward <[email protected]>
                        )

                )

            [message_type:PHPMailer:private] => plain
            [boundary:PHPMailer:private] => Array
                (
                    [1] => b1_631af702e0f737dd5c11dcff55e1d8ee
                    [2] => b2_631af702e0f737dd5c11dcff55e1d8ee
                )

            [language:protected] => Array
                (
                    [provide_address] => You must provide at least one recipient email address.
                    [mailer_not_supported] =>  mailer is not supported.
                    [execute] => Could not execute: 
                    [instantiate] => Could not instantiate mail function.
                    [authenticate] => SMTP Error: Could not authenticate.
                    [from_failed] => The following From address failed: 
                    [recipients_failed] => SMTP Error: The following recipients failed: 
                    [data_not_accepted] => SMTP Error: Data not accepted.
                    [connect_host] => SMTP Error: Could not connect to SMTP host.
                    [file_access] => Could not access file: 
                    [file_open] => File Error: Could not open file: 
                    [encoding] => Unknown encoding: 
                    [signing] => Signing Error: 
                    [smtp_error] => SMTP server error: 
                    [empty_message] => Message body empty
                    [invalid_address] => Invalid address
                    [variable_set] => Cannot set or reset variable: 
                )

            [error_count:PHPMailer:private] => 1
            [sign_cert_file:PHPMailer:private] => 
            [sign_key_file:PHPMailer:private] => 
            [sign_key_pass:PHPMailer:private] => 
            [exceptions:PHPMailer:private] => 1
        )

)

Correo electrónico recibido de Gmail.

Hi appmonkey, 

We recently blocked a sign-in attempt to your Google Account [[email protected]]. 

Sign in attempt details
Date & Time: Tuesday, August 26, 2014 9:23:38 AM UTC 
Location: Colombo, Sri Lanka 

If this wasn't you
Please review your Account Activity page at https://security.google.com/settings/security/activity to see if anything looks suspicious. Whoever tried to sign in to your account knows your password; we recommend that you change it right away. 

If this was you
You can switch to an app made by Google such as Gmail to access your account (recommended) or change your settings at https://www.google.com/settings/security/lesssecureapps so that your account is no longer protected by modern security standards. 

To learn more, see https://support.google.com/accounts/answer/6010255. 

Sincerely,
The Google Accounts team