phpMailer电子邮件未发送gmail-smtp

我无法使用gmail SMTP发送电子邮件，这是我print_r对象时得到的结果。

我对phpMailer属性的用户名和密码使用了相同的gmail凭据，所以我确信我的凭据是正确的，但不知道为什么不发送。

谢谢，感谢您的支持。

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] => support@qelasy.com
            [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 help@qelasy.com.<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] => appmonkeydev@gmail.com
            [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] => azraarshu@gmail.com
                            [1] => 
                        )
                )
            [cc:PHPMailer:private] => Array
                (
                    [0] => Array
                        (
                            [0] => yohan@appmonkeyz.com
                            [1] => Yohan Hirimuthugoda
                        )
                    [1] => Array
                        (
                            [0] => azraar@app-monkeyz.com
                            [1] => Azraar Azward
                        )
                )
            [bcc:PHPMailer:private] => Array
                (
                )
            [ReplyTo:PHPMailer:private] => Array
                (
                    [support@qelasy.com] => Array
                        (
                            [0] => support@qelasy.com
                            [1] => 
                        )
                )
            [all_recipients:PHPMailer:private] => Array
                (
                    [azraarshu@gmail.com] => 1
                    [yohan@appmonkeyz.com] => 1
                    [azraar@app-monkeyz.com] => 1
                )
            [attachment:PHPMailer:private] => Array
                (
                )
            [CustomHeader:PHPMailer:private] => Array
                (
                    [0] => Array
                        (
                            [0] => Cc
                            [1] =>  Yohan Hirimuthugoda <yohan@appmonkeyz.com>
                        )
                    [1] => Array
                        (
                            [0] => Cc
                            [1] =>  Azraar Azward <azraar@app-monkeyz.com>
                        )
                )
            [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
        )
)

从Gmail收到的电子邮件。

Hi appmonkey, 
We recently blocked a sign-in attempt to your Google Account [appmonkeydev@gmail.com]. 
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